题目内容

I would not have chosen law as my major if I ____that it was so difficult to find a job.

A. had known
B. have know
C. Know
D. knew

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_____why he was against cloning human, the scientist explained that it might lead to disaster.

Asked
B. Having asked
C. Being asked
D. To be asked

Having no one else _____ him with the work, he had to put it off till later.

A. help
B. Helped
C. helping
D. to help

Salt also played an important part _____ population movement and world exploration.

A. at
B. in
C. for
D. by

Los Angeles is really a fascinating city and they have decided to stay for _____three days.

A. the other
B. Other
C. Another
D. others

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