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is often the case, we have worked out the production plan. A. Which B. When C. W

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is often the case, we have worked out the production plan. A. Which B. When C. W

_______isoften the case, we have worked out the production plan.

A. Which    B.When

C.What    D. As

 

试题答案

答案:D

提示:
as用作关系代词。