题目内容

10. —Why did the teacher get angry?

what we had done the day before yesterday.

   A. Because   B. Since

   C. As   D. Because of

10. D

10. D解析:句意:“老师为什么生气了?” “因为我们前天所做的事情。” what we had done the day before yesterday 在句 中作宾语,故用 because ofbecause,since,as引导原因状语从句。

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