单项选择题

This is the only book ______ I have on chemistry.

A. what

B. what so ever C. which
D. that

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单项选择题

Living in the central Australian desert has its problems, ______ obtaining water is not the least.

A. for which

B. to which
C. of which

D. in which

单项选择题

I had hoped that I ______ you by talking about my children.

A. shouldn’t bore

B. wouldn’t bore
C. didn’t bore

D. hadn’t bored

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