摘要： is often the case.we have worked out the production plan. A.Which B.When C.What D.As 答案 D 解析 本题考查定语从句.as 在句中指代 we have worked out the production plan 这件事,which 引导非限制性定语从句只能放在主句的后面,由于从句中缺少主语.所以不选 when,what 只能引导名词性从句.

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