-The exam was easy ,wasn't it?

问题描述:

-The exam was easy ,wasn't it?
-Yes ,but i don't think ___ could pass it.
A somebody
B anybody
C nobody
D everybody
答案是选D表示部分否定,但我想知道的是为什么不选B呢?

如果选 B,那么就是:
是很容易,但是我不认为任何人能够通过.
这就矛盾了,既然容易,那么肯定应该有一些人通过.
选 D 是正确的.