Câu hỏi: 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 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: George is not enough intelligent to pass this economics class without help.

A. enough intelligent

B. to pass

C. economics

D. help

Câu 3: You have just passed your exam. This makes your parents happy.

A. You have just passed your exam makes your parents happy.

B. That you have passed your exam makes your parents happy.

C. You have just passed your exam which it makes your parents happy.

D. Having just passed your exam making your parents happy.

Câu 4: Sleeping, resting, and to drink fruit juice are the best ways to cure for a cold.

A. Sleeping

B. to drink

C. juice

D. best ways

Câu 5: _________, we would have been forced to sack him.

A. Were he not to resign

B. If he resigned

C. Had he not resigned

D. If he had resigned

Câu 6: We should participate in the movement _________to conserve the natural environment.

A. which organized

B. organizing

C. to organize

D. organized