The house could fall down soon if no one some quick repair work.A.has doneB.is doingC.doesD.had done

题目简介

The house could fall down soon if no one some quick repair work.A.has doneB.is doingC.doesD.had done

题目详情

The house could fall down soon if no one       some quick repair work.
A.has doneB.is doingC.doesD.had done
题型:单选题难度:偏易来源:不详

答案

C
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。

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