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

A. who

B. which

C. whose

D. whom

Câu 1: ……….., 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 2: Nothing will prevent him……..succeeding. 

A. in

B. at

C. from

D. on

Câu 3: I have had a headache…………….yesterday.

A. till

B. for

C. since

D. until

Câu 4: He became…….because the company which he worked for decided to close down. 

A. reluctant

B. relieved

C. recycled

D. redundant

Câu 5: The gang admitted they had committed four recent bank robberies. 

A. confided

B. conferred

C. confessed

D. confused

Câu 6: "When will you see John?" - "I am looking forward to…………him next summer." 

A. seeing

B. seen

C. being seen

D. see