The missing boys were last seen ----- near the river.为什么填pla

问题描述:

The missing boys were last seen _____ near the river.为什么填playing “ing”形式?
1个回答 分类:英语 2014-11-03

问题解答:

我来补答
前面的missing是状语,后面是进行时态.
 
 
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