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问题: Things were____they had been before.

Things were____they had been before.
A as B because C that D where
本题因选什么,请您详细解答4个选项间的不同,谢谢!!

解答:

Things were____they had been before.
A as B because C that D where
答案:C
译文:情况就是这样的他此前曾经去过那儿.
解释: 这是一个表语从句,从句中什么都不缺就缺一个连接词,所以用that引导.