Question

【题目】 --- Why does he look so tired these days?

--- He has to work hard_______ the coming test.

A. to B. instead of C. because D. because of

Answer 1

【答案】D

【解析】

试题分析：句意：—这些天他为什么看起来那么累？—由于即将到来的考试他不得不努力工作。to到；instead of 代替，而不是；because因为；because of由于。所填词后是一个名词短语，所以选D。