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I wonder whether he knows to write a book. [ ] A.how great pains it will cost B.

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I wonder whether he knows to write a book. [ ] A.how great pains it will cost B.

I wonder whether he knows ________ to write a book.

[]

A.how great pains it will cost

B.what great pains will it take

C.what great pains it will cost

D.what great pains it will take

试题答案

答案:D