Câu hỏi: The fog made it difficult for the driver to see when the traffic lights _____.

A. adjusted

B. moved

C. changed

D. removed

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

A. merchants

B. dealers

C. businessmen

D. tradesmen

Câu 2: 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 3: How much would you ______ for repairing my watch?

A. charge

B. cost

C. spend

D. demand

Câu 4: Large waves were ______ on the seashore.

A. going

B. running

C. hitting

D. breaking

Câu 5: The country has a system of ______, most of which date from the nineteenth century.

A. channels

B. rivers

C. streams

D. canals

Câu 6: As we wait no longer for the delivery of your order, we have to ______ it.

A. postpone

B. refuse

C. return

D. cancel