题目内容

【题目】Keep quiet! Jim and Tim their homework.

A.is doingB.are doingC.doesD.do

【答案】B

【解析】

句意：保持安静！吉姆和蒂姆正在做作业。

考查时态。is doing现在进行时态的第三人称单数形式；are doing现在进行时态形式；does一般现在时态的第三人称单数形式；do动词原形。根据前句Keep quiet!可知，要用现在进行时态，主语是Jim and Tim，故填are doing，故选B。

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