Câu hỏi: We should participate in the movement _________to conserve the natural environment.

A. which organized

B. organizing

C. to organize

D. organized

Câu 1: If you ________a wallet in the street, what would you do with it?

A. found

B. have found

C. find

D. had found

Câu 2: Sports clear my mind. They also help me maintain a healthy lifestyle.

A. Not only do sports clear my mind, but they also help me maintain a healthy lifestyle.

B. Neither do sports clear my mind nor help me maintain a healthy lifestyle.

C. Sports clear my mind so that I can maintain a healthy lifestyle.

D. All that sports can do is to clear my mind instead of maintaining a healthy lifestyle.

Câu 3: People say that Cameron was the best director of his time.

A. Cameron is said to be best director of his time.

B. Cameron was said to have been the best director of his time.

C. It was said that Cameron was the best director of his time. 

D. Cameron is said to have been the best director of his time.

Câu 4: An endangered species is the one _________ population is so small that it is in danger of becoming extinct.

A. which

B. what

C. whose

D. who

Câu 5: Some snakes have hollow teeth they are called fans that they use to poison their victims.

A. Some 

B. they are called

C. use

D. their

Câu 6: The proposal seemed like a good idea. The manager refused it.

A. The manager didn't like to proposal because it didn't seem a good idea.

B. Since the proposal seemed like a good idea, the manager refused it.

C. The manager refused the proposal although it seemed like a good idea.

D. The proposal didn't seem like a good idea, so the manager didn't accept it.