【題目】We need to get to the root(本質(zhì)) of the problemwe can solve it.
A.while
B.after
C.before
D.as

【答案】C
【解析】句意:我們需要解決問題之前,弄清問題的本質(zhì)。while當(dāng)……時(shí)候,表示同時(shí)發(fā)生; after在……之后; before在……之前;as伴隨,表示同時(shí)發(fā)生。結(jié)合句意,在解決問題之前,了解清楚問題的本質(zhì)。故選C。

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