Rain forests cover less than six percent of the earth’s area, but they have 100,000 kinds of all the kinds of plants on the earth. Three-fourths of known kinds of plants and animals call the rain forest their home. Twenty percent of our different kinds of medicine comes from rain forests. The glues on an envelope and in shoes come from tropical plants. Rain forests provide materials for hundreds of other products.

Rain forests are also very important to the world’s climate. The Amazon rain forest alone receives about thirty to forty percent of the total rainfall on the earth and products about the same percentage of the world oxygen. Some scientists believe that the decreasing size of rain forests will affect the climate on the earth, making it uncomfortable or even dangerous for life.

Saving rain forests is an international problem. One country, or even a few countries, cannot solve the problem alone. The nations of the world must work together to find a solution before it is too late.

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the questions

What percent of the earth’s area do rain forests cover?

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• Nowadays there are ____________.

• The word “they” in line 17 refers to ...........

• The author uses the word “But” in paragraph 4 to ______.

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• The word “address” in in paragraph 6 can be replaced by ......

• The word "graze" in the passage is closest in meaning to_________.

• According to the passage, approximately how many non-native users of English are there in the world today?

• When she decided to give up Facebook ..............

• According to the passage, Moby Dick is__________.

• According to the passage, why did colonial printers avoid major publishing projects?

• When is the most famous football game held annually?

• The word “proliferated” is closest in meaning to ......

• In the passage, which of the following is NOT true of the Internet?

• Normal human beings ...........

• The word “it” refers to __________

• According to the passage, to learn new information, low-achieving students do NOT .............

• The word “they” in line 17 refers to ......

• The phrase "All in all "in the passage  is closest in meaning to .............

• The word “sophisticated” in line 12 could best be replaced by?

• The word “benign” in paragraph 3 is closest in meaning to ________.

• Which of the following words is most similar to the meaning of “rustic” ?