Câu hỏi: The result of the studies have had a strong impact on future developments.

A. of

B. have had

C. strong

D. on

Câu 1: After David _________ his homework, he went straight to bed.

A. had finished

B. has finished

C. was finished

D. finished

Câu 2: We should participate in the movement _________to conserve the natural environment.

A. which organized

B. organizing

C. to organize

D. organized

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: While Peter ________the rose bush in the back yard, the phone rang.

A. were watering

B. has watered

C. watered

D. was watering

Câu 5: Ms. Brown asked me _________ in my class.

A. how many students there were

B. were there how many students

C. how many students were there

D. there were how many students

Câu 6: If you ________a wallet in the street, what would you do with it?

A. found

B. have found

C. find

D. had found