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题目
题型:不详难度:来源:
The house could fall down soon if no one       some quick repair work.
A.has doneB.is doingC.doesD.had done

答案
C
解析
考查时态。在if引导的条件状语从句中,当主句中含有情态动词时,从句用一般现在时。注意此处主句中的could表示不太肯定的语气,不是一般过去时的标志。
核心考点
试题【The house could fall down soon if no one       some quick repair work.A.has done】;主要考察你对一般现在时等知识点的理解。[详细]
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