问题 选择题

---Why did the teacher get angry?  --- __________ what we had done the day before.

A.Because

B.Since

C.As

D.Because of

答案

答案:D

考查介词短语。because of 是介词短语,后接名词、代词或者接名词性从句。而在此处是有what引导的名词性从句,相当于一个名词,所以用because of。

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