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

A. postpone

B. refuse

C. return

D. cancel

Câu 2: The book ___ two weeks ago.

A. came across

B. came by

C. came into

D. came out

Câu 3: When she heard from the hospital the father had died, she ______ into tears.

A. burst

B. exploded

C. fell

D. melted

Câu 4: If you ever have the ______ to go abroad to work, you should take it.

A. possibility

B. offer

C. chance

D. event

Câu 5: Every day thousands of ______ fly the Atlantic for negotiations with American firms.

A. merchants

B. dealers

C. businessmen

D. tradesmen

Câu 6: It isn’t quite ______ that he will be present at the meeting.

A. right

B. exact

C. certain

D. formal