Ioftensawtheboys     intheriver.A.swam                 ...

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问题详情:

Ioftensawtheboys     intheriver.A.swam                 ...

I often saw the boys      in the river.

                              ming                        swim                   

【回答】

D                   see sb. do sth.意为“看到某人做某事”,see sb. doing sth.意为“看到某人正在做某事”。根据句意“我经常看到男孩们在河中游泳”可知,应用see sb. do sth.结构。*选D。

知识点:动词和动词短语

题型:选择题

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