I'm sorry. I've left so many questions -----(unanswered, to

问题描述:

I'm sorry. I've left so many questions _____(unanswered, to answer) 应该选哪一个
1个回答 分类:英语 2014-11-11

问题解答:

我来补答
unanswered
可以理解为下面形式:leave sth.undone
 
 
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