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:  The ______ of the bank where he worked was not in the centre of the city.

A. seat

B. quarter

C. branch

D. piece

Câu 2: The country has a system of ______, most of which date from the nineteenth century.

A. channels

B. rivers

C. streams

D. canals

Câu 3: It isn’t quite ______ that he will be present at the meeting.

A. right

B. exact

C. certain

D. formal

Câu 4: The book ___ two weeks ago.

A. came across

B. came by

C. came into

D. came out

Câu 5: The fog made it difficult for the driver to see when the traffic lights _____.

A. adjusted

B. moved

C. changed

D. removed

Câu 6:  The audience waited until the curtain had risen and then _____ into applause.

A. flooded

B. cheered

C. started

D. burst