题目内容

3.警方正在忙于找到事故的原因.The police are busy finding out the cause of the accident..

分析 The police are busy finding out the cause of the accident.

解答 答案:The police are busy finding out the cause of the accident.
这里是说客观事实用一般现在时,表示正忙于做某事用be busy doing sth,主语是the police复数,故用are,找到原因查明原因用动词短语find out,事故的原因用of所有格表达the cause of the accident.故答案是The police are busy finding out the cause of the accident.

点评 busy 短语的用法常用的有两个:
be busy with sth 忙于做某事 
be busy doing sth 忙于做某事

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