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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

   is often the case, we have worked out theproduction plan.

A. Which  B.When   C.What    D.As

 

试题答案

答案:D

提示:
本题考查定语从句的引导词问题。定语从句一般要紧跟在其所修饰的先行词之后,只有as引导的非限制性定语从句的位置较灵活,可位于句首、句中或句末。本题中as在定语从句中作主语。which在定语从句中可作主语或宾语,不能位于句首;when在定语从句中作状语,不能位于句首;what不引导定语从句。