Câu hỏi: As there was a power cut in the hospital, the surgeon had to _____ the operation.

A. call for

B. call on

C. call off

D. call out

Câu 1: Every day thousands of ______ fly the Atlantic for negotiations with American firms.

A. merchants

B. dealers

C. businessmen

D. tradesmen

Câu 2: Large waves were ______ on the seashore.

A. going

B. running

C. hitting

D. breaking

Câu 3: The flat we have rented is very _______ for the underground station.

A. convenient

B. suitable

C. comfortable

D. distant

Câu 4: As we wait no longer for the delivery of your order, we have to ______ it.

A. postpone

B. refuse

C. return

D. cancel

Câu 5: He spoke so quickly that I didn’t ______ what he said.

A. receive

B. accept

C. listen

D. catch

Câu 6: If you ever have the ______ to go abroad to work, you should take it.

A. possibility

B. offer

C. chance

D. event