填空:( )we were at school ,we went to the library everyday.

问题描述:

填空:( )we were at school ,we went to the library everyday.
1个回答 分类:英语 2014-10-20

问题解答:

我来补答
when
句子用的是过去式,证明是说过去的事情了,if表示的是假设,是条件
 
 
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