How long has the lab in your school been---use?

问题描述:

How long has the lab in your school been___use?
A.into B.in C.of D.for
答案应该选B,为什么不是A?请说明原因,谢谢~
1个回答 分类:英语 2014-12-06

问题解答:

我来补答
in use是“使用中”的意思,是个短语,没有“into use”的说法!
 
 
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