Question

Brain told you that there wasn’t anyone in the room at this time, ______?

1. A.
   was there
2. B.
   wasn’t there
3. C.
   didn’t he
4. D.
   did he

Answer 1

C
思路解析：此题陈述句部分在陈述一个事实，即Brain说过什么话。因此反意疑问句的主语就是主句的主语Brain，疑问词当然就是do的否定形式的过去式。
绿色通道：在陈述句部分是“I/We think(believe, suppose, imagine, expect等)+宾语从句”的句型中，反意疑问句由从句的主语决定。