you two keep guard at the door 和you two to keep gard at the

问题描述:

you two keep guard at the door 和you two to keep gard at the door 哪个对 为什么
1个回答 分类:英语 2014-11-18

问题解答:

我来补答
前者对
后者错 因为没有谓语
 
 
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