______of them knows French,so I have to ask a third person for help.

问题描述:

______of them knows French,so I have to ask a third person for help.
A.Both B.Each C.None D.Neither
还要说为什么,
第三个人不是The third person吗?

选择D 首先根据句子意思可以排除A和B.然后因为know是三人称单数.a third person(第三个人)可以知道原来只有两个人.排除C.只有 D是正确的了