【題目】China is playing a key role in controlling the virus. However, it will take long and much effort ________ it is under control.

A.untilB.afterC.beforeD.unless

【答案】C

【解析】

考查連詞辨析。句意：中國在控制病毒方面發(fā)揮著關(guān)鍵作用。 但是，需要很長時間并付出很大努力才能控制住它。A. until直到……時；B. after在……之后；C. before在……之前，在（一段時間 ）之后才……；D. unless除非，如果不。before的基本含義是“在……之前”，又可以根據(jù)不同語境靈活翻譯成 “才”、“還沒來得及就……”、“就”等。before在這里引導時間狀語從句，可譯為“才”。故選C。

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