题目内容

It is difficult for a foreigner __________ Chinese.

A. write
B. to write
C. be written
D. written

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The car is rather difficult __________.

A. to repair
B. to be repaired
C. repairing
D. being repaired

6. He was nowhere __________.a. to see b. to be seen c. seeing d. seen

A. to see
B. to be seen
C. seeing
D. seen

The work __________ as soon as possible.

A. has done
B. has been doing
C. should be done
D. is being done

I think the dog__________ killed last night.

A. must have been
B. should be
C. ought to
D. had