Choose the best answer to each question. 

A keystone species is a species of plant or animal ________absence has a major effect on an ecological system.

Câu hỏi liên quan

• Choose the best answer to each question. 

  __________ the barrier at the side of the road, the car would have crashed into the valley below.

• Each of the following sentences has an error. Find the errors and correct them.

  He drives too fast that no one likes to ride with him.

• Choose the best answer to each question. 

  “You’ve got a great suntan!” – “I went away for a few days to ________ my batteries.”

ZUNIA12

• Identify the word or phrase that must be changed for the sentence to be correct.

  Each of the students in the class has to do their own assignment this semester.

• Choose the best answer to each question. 

  Anna: “You don’t have to go to school this afternoon, do you?” Bob: “_____________”.

• Choose the best answer to each question. 

  The job of student lodgings officer________ many visits to landladies.

• I saw your advertisement _________ English classes in Sunflowers magazine 

• Choose the best answer to each question. 

  He just couldn’t open the jar _____ hard he tried.

• Choose A, B, C or D to complete the sentence.

  We’d better _______ really early. It’s a very long journey.

• Choose the best answer to each question. 

  He talks so much as if he _________the owner of the party.

• Choose the correct completion

  We really ought to leave now ,......?

• Each of the following sentences has an error. Find the errors and correct them.

  I found it wonderfully to travel abroad.

• Choose the best answer to each question. 

  Unfortunately, our local cinema is on the ________ of closing down.

• Choose A, B, C, or D to complete each sentence.

  Their students wish that there ….. a swimming pool in their school so that they could learn to swim every day.

• Each of the following sentences has an error. Find the errors and correct them.

  A dog should be checked regular by a veterinarian to ensure that it remains in good health.

• I wish I  ………………(live) in a big city. It's so boring in the country.

• Do you think children’s games should be …………….……… (EDUCATE).

• Each of the following sentences has an error. Find the errors and correct them.

  They’re going to get their house decorate for May Day.

• There is one mistake in each sentence. Identify the mistake and write A, B, C, or D to indicate your answer.

  The better (A) you are at (B) English, more chance (C) you have to get a job (D) with international organizations.

• Each of the following sentences has an error. Find the errors and correct them.

  I enjoy walking to school, but on rainy days I_________ to going by bus.