【題目】 We need to get to the root of the problem______ we can solve it.

A. while B. after

C. before D. as

【答案】C

【解析】

試題分析:句意:在我們解決問(wèn)題之前,我們需要找到問(wèn)題的根源。A. while當(dāng)……時(shí)候,而;B. after……之后; C. before ……之前;D. as正如。根據(jù)句意可知選C。

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