suddenly he heard someone -----(cry )for help.答案上是crying,为什么

问题描述:

suddenly he heard someone _____(cry )for help.答案上是crying,为什么阿?
1个回答 分类:英语 2014-10-26

问题解答:

我来补答
hear sb doing sth 听到某人正在做某事.
 
 
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