题目内容

My mother is busy_____ the room.

A.clean             B.to clean           C.cleaning          D.cleans

 

【答案】

C

【解析】

试题分析:根据题干可知,此句考查的重点是固定短语be busy doing sth表示忙于做某事,本句的含义是妈妈正忙着打扫房间,故选C。

考点:be busy doing sth

点评:此题考查动词的形式,在此句型结构中要用动词的ing形式。和它含义类似的短语还有 be busy with sth表示忙于做某事,因此要分清两者之间的不同。

 

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