Câu hỏi: I…………..recently. 

A. can't have slept

B. won't have slept

C. didn't sleep

D. haven't been able to sleep

Câu 1: The policemen………the robbery are looking for three young men.

A. investigate

B. investigating

C. investigated

D. investigates

Câu 2: I have had a headache…………….yesterday.

A. till

B. for

C. since

D. until

Câu 3: ……….., 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 4: The principal doesn't permit………here. 

A. to shout

B. shout

C. shouting

D. shouted

Câu 5: The chief of police………work is very important takes care of the public safety. 

A. who

B. which

C. whose

D. whom

Câu 6: The gang admitted they had committed four recent bank robberies. 

A. confided

B. conferred

C. confessed

D. confused