Câu hỏi: ……….., he would have been able to pass the exam. 

A. If he studied hard

B. If studying hard

C. If he were studying hard

D. Had he studied hard

Câu 1: The students were all………….by the lion's roar. 

A. frighented

B. destroyed

C. bitten

D. collapsed

Câu 2: "When will you see John?" - "I am looking forward to…………him next summer." 

A. seeing

B. seen

C. being seen

D. see

Câu 3: There was a short silence and then footsteps were heard ………from the direction of the library. 

A. come

B. to come

C. came 

D. be coming

Câu 4: The principal doesn't permit………here. 

A. to shout

B. shout

C. shouting

D. shouted

Câu 5: Jack has three brothers, all of ………..are married. 

A. whom

B. who

C. whose

D. that

Câu 6: The chief of police………work is very important takes care of the public safety. 

A. who

B. which

C. whose

D. whom