Choose the word or phrase among A, B, C or D that best fits the blank space in the following passage.

Neil Armstrong was the first person (1)…….. on the moon. He was born in Ohio on August 5, 1930. While he was in college, he left to serve in the U.S. Navy. He flew planes during the Korean War. Then he came back to college and finished the degree he (2)……... He later (3)…….. a master's degree too.

Armstrong became an astronaut in 1962. He was the commander of Gemini 8 in 1966. Neil Armstrong (4)…….. the first successful connection of two vehicles in space.

Armstrong’s second flight was Apollo 11 in 1969, and he was the mission commander. He flew with Buzz Aldrin and Michael Collins. Armstrong and Aldrin landed on the moon in a lunar module named "Eagle". With more than half a billion people (5)…….. on television, Armstrong (6)……… the ladder and said, "That's one small step for a man, one giant leap for mankind." and Aldrin (7)……. him shortly. They explored the surface for two and a half hours, collecting samples and taking photographs.

They left behind an American flag, and a plaque reading, "Here men from the planet Earth first (8)………..upon the moon. July 1969 A.D. We came in (9)…….for all mankind."

After almost a day, they blasted off. They docked with Collins in (10)……….around the noon. All three then flew back to the Earth.

 He later (3)…….. a master's degree too.

The Shuttle Era Comes to an End

The set of Space Shuttle missions run by NASA captivated the world and proved that reusable spacecraft could be used to bring astronauts and cargo into space. The Space Shuttle programme had a total of six separate orbiters, five of which actually went into space. The first-made orbiter was only used to gather data about how the shuttles would glide back to the earth. This shuttle would be brought up into the air by a specially modified Boeing 747 and released to glide down without any power of its own.

The Space Shuttle Era ran from the first launch on April 12, 1981, and ended when the final shuttle landed on July 21, 2011. During this time, there were 135 missions flown. Of the five shuttles that did go into space, two met with disasters that killed all the crew members aboard.The first disaster happened on January 28, 1986 when Space Shuttle Challenger ran into severe problems and exploded less than two minutes after take-off. It was a major blow to NASA as a school teacher was on board the orbiter, and the launch was being watched by children from schools across the United States. The second disaster came on February 1, 2003. After having completed its mission, Space Shuttle Columbia was returning to the earth from space. During damage done to a wing during its launch, the orbiter disintegrated as it hit the earth’s atmosphere during re-entry.

Because the Space Shuttle programme was running, it largely made possible the construction of the International Space Station (ISS). The shuttles brought astronauts to the station, replenished supplies, and carried actual pieces to the Space Station up from the earth.As the Space Shuttle Era came to an end, many space lovers have been left wondering, “What’s next?” There is still plenty to explore, so we will all just have to wait and see.

What was captivated in the passage?

Read the passage then choose the best answer: The Taj Mahal is considered one of the wonders of the world. It was built by the fifth Mughal Emperor of India as a memorial to his beloved wife, Mumtaz Mahal, who died when she was giving birth to their 14th child in 1631. He began to build a monument in the same year and mourned her for ten years. The Taj Mahal was completed 22 years later at the cost of 32 million rupees. Twenty thousand people worked on it.
    The Taj Mahal, meaning “Crown of the Palace”, stands on the bank of the Yamuna River in Agra. Built of white marble, its beauty is beyond description, particularly at dawn and sunset. It was said that the King spent the last days of his life in prison staring into a small piece of glass at the reflection of The Taj Mahal, and he died with a mirror in his hand. He was buried in The Taj Mahal with the wife he never forgot.

The phrase is beyond description in the passage means_________.

Choose the word or phrase among A, B, C or D that best fits the blank space in the following passage.

Neil Armstrong was the first person (1)…….. on the moon. He was born in Ohio on August 5, 1930. While he was in college, he left to serve in the U.S. Navy. He flew planes during the Korean War. Then he came back to college and finished the degree he (2)……... He later (3)…….. a master's degree too.

Armstrong became an astronaut in 1962. He was the commander of Gemini 8 in 1966. Neil Armstrong (4)…….. the first successful connection of two vehicles in space.

Armstrong’s second flight was Apollo 11 in 1969, and he was the mission commander. He flew with Buzz Aldrin and Michael Collins. Armstrong and Aldrin landed on the moon in a lunar module named "Eagle". With more than half a billion people (5)…….. on television, Armstrong (6)……… the ladder and said, "That's one small step for a man, one giant leap for mankind." and Aldrin (7)……. him shortly. They explored the surface for two and a half hours, collecting samples and taking photographs.

They left behind an American flag, and a plaque reading, "Here men from the planet Earth first (8)………..upon the moon. July 1969 A.D. We came in (9)…….for all mankind."

After almost a day, they blasted off. They docked with Collins in (10)……….around the noon. All three then flew back to the Earth.

With more than half a billion people (5)…….. on television

The Shuttle Era Comes to an End

The set of Space Shuttle missions run by NASA captivated the world and proved that reusable spacecraft could be used to bring astronauts and cargo into space. The Space Shuttle programme had a total of six separate orbiters, five of which actually went into space. The first-made orbiter was only used to gather data about how the shuttles would glide back to the earth. This shuttle would be brought up into the air by a specially modified Boeing 747 and released to glide down without any power of its own.

The Space Shuttle Era ran from the first launch on April 12, 1981, and ended when the final shuttle landed on July 21, 2011. During this time, there were 135 missions flown. Of the five shuttles that did go into space, two met with disasters that killed all the crew members aboard.The first disaster happened on January 28, 1986 when Space Shuttle Challenger ran into severe problems and exploded less than two minutes after take-off. It was a major blow to NASA as a school teacher was on board the orbiter, and the launch was being watched by children from schools across the United States. The second disaster came on February 1, 2003. After having completed its mission, Space Shuttle Columbia was returning to the earth from space. During damage done to a wing during its launch, the orbiter disintegrated as it hit the earth’s atmosphere during re-entry.

Because the Space Shuttle programme was running, it largely made possible the construction of the International Space Station (ISS). The shuttles brought astronauts to the station, replenished supplies, and carried actual pieces to the Space Station up from the earth.As the Space Shuttle Era came to an end, many space lovers have been left wondering, “What’s next?” There is still plenty to explore, so we will all just have to wait and see.

Who was mentioned as being on board the Space Shuttle Challenger?

Read the passage then choose the best answer: The Taj Mahal is considered one of the wonders of the world. It was built by the fifth Mughal Emperor of India as a memorial to his beloved wife, Mumtaz Mahal, who died when she was giving birth to their 14th child in 1631. He began to build a monument in the same year and mourned her for ten years. The Taj Mahal was completed 22 years later at the cost of 32 million rupees. Twenty thousand people worked on it.
    The Taj Mahal, meaning “Crown of the Palace”, stands on the bank of the Yamuna River in Agra. Built of white marble, its beauty is beyond description, particularly at dawn and sunset. It was said that the King spent the last days of his life in prison staring into a small piece of glass at the reflection of The Taj Mahal, and he died with a mirror in his hand. He was buried in The Taj Mahal with the wife he never forgot.

How much did The Taj Mahal cost?

Choose the word or phrase among A, B, C or D that best fits the blank space in the following passage.

Neil Armstrong was the first person (1)…….. on the moon. He was born in Ohio on August 5, 1930. While he was in college, he left to serve in the U.S. Navy. He flew planes during the Korean War. Then he came back to college and finished the degree he (2)……... He later (3)…….. a master's degree too.

Armstrong became an astronaut in 1962. He was the commander of Gemini 8 in 1966. Neil Armstrong (4)…….. the first successful connection of two vehicles in space.

Armstrong’s second flight was Apollo 11 in 1969, and he was the mission commander. He flew with Buzz Aldrin and Michael Collins. Armstrong and Aldrin landed on the moon in a lunar module named "Eagle". With more than half a billion people (5)…….. on television, Armstrong (6)……… the ladder and said, "That's one small step for a man, one giant leap for mankind." and Aldrin (7)……. him shortly. They explored the surface for two and a half hours, collecting samples and taking photographs.

They left behind an American flag, and a plaque reading, "Here men from the planet Earth first (8)………..upon the moon. July 1969 A.D. We came in (9)…….for all mankind."

After almost a day, they blasted off. They docked with Collins in (10)……….around the noon. All three then flew back to the Earth.

 "Here men from the planet Earth first (8)………..upon the moon. July 1969 A.D.

The Shuttle Era Comes to an End

The set of Space Shuttle missions run by NASA captivated the world and proved that reusable spacecraft could be used to bring astronauts and cargo into space. The Space Shuttle programme had a total of six separate orbiters, five of which actually went into space. The first-made orbiter was only used to gather data about how the shuttles would glide back to the earth. This shuttle would be brought up into the air by a specially modified Boeing 747 and released to glide down without any power of its own.

The Space Shuttle Era ran from the first launch on April 12, 1981, and ended when the final shuttle landed on July 21, 2011. During this time, there were 135 missions flown. Of the five shuttles that did go into space, two met with disasters that killed all the crew members aboard.The first disaster happened on January 28, 1986 when Space Shuttle Challenger ran into severe problems and exploded less than two minutes after take-off. It was a major blow to NASA as a school teacher was on board the orbiter, and the launch was being watched by children from schools across the United States. The second disaster came on February 1, 2003. After having completed its mission, Space Shuttle Columbia was returning to the earth from space. During damage done to a wing during its launch, the orbiter disintegrated as it hit the earth’s atmosphere during re-entry.

Because the Space Shuttle programme was running, it largely made possible the construction of the International Space Station (ISS). The shuttles brought astronauts to the station, replenished supplies, and carried actual pieces to the Space Station up from the earth.As the Space Shuttle Era came to an end, many space lovers have been left wondering, “What’s next?” There is still plenty to explore, so we will all just have to wait and see.

When did the second disaster take place?

Choose the word or phrase among A, B, C or D that best fits the blank space in the following passage.

Neil Armstrong was the first person (1)…….. on the moon. He was born in Ohio on August 5, 1930. While he was in college, he left to serve in the U.S. Navy. He flew planes during the Korean War. Then he came back to college and finished the degree he (2)……... He later (3)…….. a master's degree too.

Armstrong became an astronaut in 1962. He was the commander of Gemini 8 in 1966. Neil Armstrong (4)…….. the first successful connection of two vehicles in space.

Armstrong’s second flight was Apollo 11 in 1969, and he was the mission commander. He flew with Buzz Aldrin and Michael Collins. Armstrong and Aldrin landed on the moon in a lunar module named "Eagle". With more than half a billion people (5)…….. on television, Armstrong (6)……… the ladder and said, "That's one small step for a man, one giant leap for mankind." and Aldrin (7)……. him shortly. They explored the surface for two and a half hours, collecting samples and taking photographs.

They left behind an American flag, and a plaque reading, "Here men from the planet Earth first (8)………..upon the moon. July 1969 A.D. We came in (9)…….for all mankind."

After almost a day, they blasted off. They docked with Collins in (10)……….around the noon. All three then flew back to the Earth.

Neil Armstrong was the first person (1)…….. on the moon. 

Choose the word or phrase among A, B, C or D that best fits the blank space in the following passage.

Neil Armstrong was the first person (1)…….. on the moon. He was born in Ohio on August 5, 1930. While he was in college, he left to serve in the U.S. Navy. He flew planes during the Korean War. Then he came back to college and finished the degree he (2)……... He later (3)…….. a master's degree too.

Armstrong became an astronaut in 1962. He was the commander of Gemini 8 in 1966. Neil Armstrong (4)…….. the first successful connection of two vehicles in space.

Armstrong’s second flight was Apollo 11 in 1969, and he was the mission commander. He flew with Buzz Aldrin and Michael Collins. Armstrong and Aldrin landed on the moon in a lunar module named "Eagle". With more than half a billion people (5)…….. on television, Armstrong (6)……… the ladder and said, "That's one small step for a man, one giant leap for mankind." and Aldrin (7)……. him shortly. They explored the surface for two and a half hours, collecting samples and taking photographs.

They left behind an American flag, and a plaque reading, "Here men from the planet Earth first (8)………..upon the moon. July 1969 A.D. We came in (9)…….for all mankind."

After almost a day, they blasted off. They docked with Collins in (10)……….around the noon. All three then flew back to the Earth.

Neil Armstrong (4)…….. the first successful connection of two vehicles in space.

Neil Armstrong was the first person (1)…….. on the moon. He was born in Ohio on August 5, 1930. While he was in college, he left to serve in the U.S. Navy. He flew planes during the Korean War. Then he came back to college and finished the degree he (2)……... He later (3)…….. a master's degree too.

Armstrong became an astronaut in 1962. He was the commander of Gemini 8 in 1966. Neil Armstrong (4)…….. the first successful connection of two vehicles in space.

Armstrong’s second flight was Apollo 11 in 1969, and he was the mission commander. He flew with Buzz Aldrin and Michael Collins. Armstrong and Aldrin landed on the moon in a lunar module named "Eagle". With more than half a billion people (5)…….. on television, Armstrong (6)……… the ladder and said, "That's one small step for a man, one giant leap for mankind." and Aldrin (7)……. him shortly. They explored the surface for two and a half hours, collecting samples and taking photographs.

They left behind an American flag, and a plaque reading, "Here men from the planet Earth first (8)………..upon the moon. July 1969 A.D. We came in (9)…….for all mankind."

After almost a day, they blasted off. They docked with Collins in (10)……….around the noon. All three then flew back to the Earth.

10 is .................

The Shuttle Era Comes to an End

The set of Space Shuttle missions run by NASA captivated the world and proved that reusable spacecraft could be used to bring astronauts and cargo into space. The Space Shuttle programme had a total of six separate orbiters, five of which actually went into space. The first-made orbiter was only used to gather data about how the shuttles would glide back to the earth. This shuttle would be brought up into the air by a specially modified Boeing 747 and released to glide down without any power of its own.

The Space Shuttle Era ran from the first launch on April 12, 1981, and ended when the final shuttle landed on July 21, 2011. During this time, there were 135 missions flown. Of the five shuttles that did go into space, two met with disasters that killed all the crew members aboard.The first disaster happened on January 28, 1986 when Space Shuttle Challenger ran into severe problems and exploded less than two minutes after take-off. It was a major blow to NASA as a school teacher was on board the orbiter, and the launch was being watched by children from schools across the United States. The second disaster came on February 1, 2003. After having completed its mission, Space Shuttle Columbia was returning to the earth from space. During damage done to a wing during its launch, the orbiter disintegrated as it hit the earth’s atmosphere during re-entry.

Because the Space Shuttle programme was running, it largely made possible the construction of the International Space Station (ISS). The shuttles brought astronauts to the station, replenished supplies, and carried actual pieces to the Space Station up from the earth.As the Space Shuttle Era came to an end, many space lovers have been left wondering, “What’s next?” There is still plenty to explore, so we will all just have to wait and see.

How many orbiters are there in the Space Shuttle programme mentioned in the passage?

Neil Armstrong was the first person (1)…….. on the moon. He was born in Ohio on August 5, 1930. While he was in college, he left to serve in the U.S. Navy. He flew planes during the Korean War. Then he came back to college and finished the degree he (2)……... He later (3)…….. a master's degree too.

Armstrong became an astronaut in 1962. He was the commander of Gemini 8 in 1966. Neil Armstrong (4)…….. the first successful connection of two vehicles in space.

Armstrong’s second flight was Apollo 11 in 1969, and he was the mission commander. He flew with Buzz Aldrin and Michael Collins. Armstrong and Aldrin landed on the moon in a lunar module named "Eagle". With more than half a billion people (5)…….. on television, Armstrong (6)……… the ladder and said, "That's one small step for a man, one giant leap for mankind." and Aldrin (7)……. him shortly. They explored the surface for two and a half hours, collecting samples and taking photographs.

They left behind an American flag, and a plaque reading, "Here men from the planet Earth first (8)………..upon the moon. July 1969 A.D. We came in (9)…….for all mankind."

After almost a day, they blasted off. They docked with Collins in (10)……….around the noon. All three then flew back to the Earth.

9 is ....................

Neil Armstrong was the first person (1)…….. on the moon. He was born in Ohio on August 5, 1930. While he was in college, he left to serve in the U.S. Navy. He flew planes during the Korean War. Then he came back to college and finished the degree he (2)……... He later (3)…….. a master's degree too.

Armstrong became an astronaut in 1962. He was the commander of Gemini 8 in 1966. Neil Armstrong (4)…….. the first successful connection of two vehicles in space.

Armstrong’s second flight was Apollo 11 in 1969, and he was the mission commander. He flew with Buzz Aldrin and Michael Collins. Armstrong and Aldrin landed on the moon in a lunar module named "Eagle". With more than half a billion people (5)…….. on television, Armstrong (6)……… the ladder and said, "That's one small step for a man, one giant leap for mankind." and Aldrin (7)……. him shortly. They explored the surface for two and a half hours, collecting samples and taking photographs.

They left behind an American flag, and a plaque reading, "Here men from the planet Earth first (8)………..upon the moon. July 1969 A.D. We came in (9)…….for all mankind."

After almost a day, they blasted off. They docked with Collins in (10)……….around the noon. All three then flew back to the Earth.

2 is ..................

Read the passage then choose the best answer: The Taj Mahal is considered one of the wonders of the world. It was built by the fifth Mughal Emperor of India as a memorial to his beloved wife, Mumtaz Mahal, who died when she was giving birth to their 14th child in 1631. He began to build a monument in the same year and mourned her for ten years. The Taj Mahal was completed 22 years later at the cost of 32 million rupees. Twenty thousand people worked on it.
    The Taj Mahal, meaning “Crown of the Palace”, stands on the bank of the Yamuna River in Agra. Built of white marble, its beauty is beyond description, particularly at dawn and sunset. It was said that the King spent the last days of his life in prison staring into a small piece of glass at the reflection of The Taj Mahal, and he died with a mirror in his hand. He was buried in The Taj Mahal with the wife he never forgot.

Which of the following is NOT true about the King?     

Neil Armstrong was the first person (1)…….. on the moon. He was born in Ohio on August 5, 1930. While he was in college, he left to serve in the U.S. Navy. He flew planes during the Korean War. Then he came back to college and finished the degree he (2)……... He later (3)…….. a master's degree too.

Armstrong became an astronaut in 1962. He was the commander of Gemini 8 in 1966. Neil Armstrong (4)…….. the first successful connection of two vehicles in space.

Armstrong’s second flight was Apollo 11 in 1969, and he was the mission commander. He flew with Buzz Aldrin and Michael Collins. Armstrong and Aldrin landed on the moon in a lunar module named "Eagle". With more than half a billion people (5)…….. on television, Armstrong (6)……… the ladder and said, "That's one small step for a man, one giant leap for mankind." and Aldrin (7)……. him shortly. They explored the surface for two and a half hours, collecting samples and taking photographs.

They left behind an American flag, and a plaque reading, "Here men from the planet Earth first (8)………..upon the moon. July 1969 A.D. We came in (9)…….for all mankind."

After almost a day, they blasted off. They docked with Collins in (10)……….around the noon. All three then flew back to the Earth.

5 is ........................

Neil Armstrong was the first person (1)…….. on the moon. He was born in Ohio on August 5, 1930. While he was in college, he left to serve in the U.S. Navy. He flew planes during the Korean War. Then he came back to college and finished the degree he (2)……... He later (3)…….. a master's degree too.

Armstrong became an astronaut in 1962. He was the commander of Gemini 8 in 1966. Neil Armstrong (4)…….. the first successful connection of two vehicles in space.

Armstrong’s second flight was Apollo 11 in 1969, and he was the mission commander. He flew with Buzz Aldrin and Michael Collins. Armstrong and Aldrin landed on the moon in a lunar module named "Eagle". With more than half a billion people (5)…….. on television, Armstrong (6)……… the ladder and said, "That's one small step for a man, one giant leap for mankind." and Aldrin (7)……. him shortly. They explored the surface for two and a half hours, collecting samples and taking photographs.

They left behind an American flag, and a plaque reading, "Here men from the planet Earth first (8)………..upon the moon. July 1969 A.D. We came in (9)…….for all mankind."

After almost a day, they blasted off. They docked with Collins in (10)……….around the noon. All three then flew back to the Earth.

1 is ...............

Neil Armstrong was the first person (1)…….. on the moon. He was born in Ohio on August 5, 1930. While he was in college, he left to serve in the U.S. Navy. He flew planes during the Korean War. Then he came back to college and finished the degree he (2)……... He later (3)…….. a master's degree too.

Armstrong became an astronaut in 1962. He was the commander of Gemini 8 in 1966. Neil Armstrong (4)…….. the first successful connection of two vehicles in space.

Armstrong’s second flight was Apollo 11 in 1969, and he was the mission commander. He flew with Buzz Aldrin and Michael Collins. Armstrong and Aldrin landed on the moon in a lunar module named "Eagle". With more than half a billion people (5)…….. on television, Armstrong (6)……… the ladder and said, "That's one small step for a man, one giant leap for mankind." and Aldrin (7)……. him shortly. They explored the surface for two and a half hours, collecting samples and taking photographs.

They left behind an American flag, and a plaque reading, "Here men from the planet Earth first (8)………..upon the moon. July 1969 A.D. We came in (9)…….for all mankind."

After almost a day, they blasted off. They docked with Collins in (10)……….around the noon. All three then flew back to the Earth.

8 is .....................

Choose the word or phrase among A, B, C or D that best fits the blank space in the following passage.

Neil Armstrong was the first person (1)…….. on the moon. He was born in Ohio on August 5, 1930. While he was in college, he left to serve in the U.S. Navy. He flew planes during the Korean War. Then he came back to college and finished the degree he (2)……... He later (3)…….. a master's degree too.

Armstrong became an astronaut in 1962. He was the commander of Gemini 8 in 1966. Neil Armstrong (4)…….. the first successful connection of two vehicles in space.

Armstrong’s second flight was Apollo 11 in 1969, and he was the mission commander. He flew with Buzz Aldrin and Michael Collins. Armstrong and Aldrin landed on the moon in a lunar module named "Eagle". With more than half a billion people (5)…….. on television, Armstrong (6)……… the ladder and said, "That's one small step for a man, one giant leap for mankind." and Aldrin (7)……. him shortly. They explored the surface for two and a half hours, collecting samples and taking photographs.

They left behind an American flag, and a plaque reading, "Here men from the planet Earth first (8)………..upon the moon. July 1969 A.D. We came in (9)…….for all mankind."

After almost a day, they blasted off. They docked with Collins in (10)……….around the noon. All three then flew back to the Earth.

Then he came back to college and finished the degree he (2)……... 

Choose the word or phrase among A, B, C or D that best fits the blank space in the following passage.

Neil Armstrong was the first person (1)…….. on the moon. He was born in Ohio on August 5, 1930. While he was in college, he left to serve in the U.S. Navy. He flew planes during the Korean War. Then he came back to college and finished the degree he (2)……... He later (3)…….. a master's degree too.

Armstrong became an astronaut in 1962. He was the commander of Gemini 8 in 1966. Neil Armstrong (4)…….. the first successful connection of two vehicles in space.

Armstrong’s second flight was Apollo 11 in 1969, and he was the mission commander. He flew with Buzz Aldrin and Michael Collins. Armstrong and Aldrin landed on the moon in a lunar module named "Eagle". With more than half a billion people (5)…….. on television, Armstrong (6)……… the ladder and said, "That's one small step for a man, one giant leap for mankind." and Aldrin (7)……. him shortly. They explored the surface for two and a half hours, collecting samples and taking photographs.

They left behind an American flag, and a plaque reading, "Here men from the planet Earth first (8)………..upon the moon. July 1969 A.D. We came in (9)…….for all mankind."

After almost a day, they blasted off. They docked with Collins in (10)……….around the noon. All three then flew back to the Earth.

Armstrong (6)……… the ladder and said, "That's one small step for a man, one giant leap for mankind." 

Neil Armstrong was the first person (1)…….. on the moon. He was born in Ohio on August 5, 1930. While he was in college, he left to serve in the U.S. Navy. He flew planes during the Korean War. Then he came back to college and finished the degree he (2)……... He later (3)…….. a master's degree too.

Armstrong became an astronaut in 1962. He was the commander of Gemini 8 in 1966. Neil Armstrong (4)…….. the first successful connection of two vehicles in space.

Armstrong’s second flight was Apollo 11 in 1969, and he was the mission commander. He flew with Buzz Aldrin and Michael Collins. Armstrong and Aldrin landed on the moon in a lunar module named "Eagle". With more than half a billion people (5)…….. on television, Armstrong (6)……… the ladder and said, "That's one small step for a man, one giant leap for mankind." and Aldrin (7)……. him shortly. They explored the surface for two and a half hours, collecting samples and taking photographs.

They left behind an American flag, and a plaque reading, "Here men from the planet Earth first (8)………..upon the moon. July 1969 A.D. We came in (9)…….for all mankind."

After almost a day, they blasted off. They docked with Collins in (10)……….around the noon. All three then flew back to the Earth.

3 is ...........