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I don't remember how many years ago people began to grow crops.A. it was when B.

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I don't remember how many years ago people began to grow crops.A. it was when B.

I don't remember how many years ago ______ people began to grow crops.

A. it was when              B. it was that         C. was it when         D. was it that

试题答案

B

标签：yearsagopeoplemanydon

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