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: 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.

Câu 2: 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 3: She raised her hand high. She wanted to attract her teacher’s attention.

A. Because her teacher attracted her, she raised her hand high.

B. She had such a high raising of hand that she attracted her teacher’s attention.

C. Though she raised her hand high, she could not attract her teacher’s attention.

D. To attract her teacher’s attention, she raised her hand high.

Câu 4: After David _________ his homework, he went straight to bed.

A. had finished

B. has finished

C. was finished

D. finished

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: _________, 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