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问题: 高一英语选择题,请说明选与不选的原因,谢谢!

That is the reason _________ he gave us for carrying out the plan.
A.because B.why C. how D.which

解答:

在reason后的定语从句常由why引导。

例如:

Do you know the reason why he is absent?

注意:如果“理由”是在定语从句中作宾语,那么关系词只能用which或that。

例如:That is the reason which / that he gave us for carrying out the plan.
学生做此题时易误选B。他们认为the reason后面肯定应接why引导的定语从句。但在此题的定语从句中,gave需要两个宾语,US是间接宾语。