问题描述：
Brain told you that there wasn't anyone in the room at that time____?
A was there B wasn't there C didn't he D did he
问题解答：
c
如果主语是第一人称（I, We）的话，反意疑问句应该根据从句来判断
如： I told you that there wasn't anyone in the room, was there?
http://baike.baidu.com/view/201301.html?wtp=tt
反意疑问句
选c
d
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