No one except his parents____ where the boy has gone.
问题描述：
No one except his parents____ where the boy has gone.
A.know
B.knows
C.has knows
D.have known
怎么选?怎么翻译?考什么语法知识点?
答
没人知道这个男孩去哪了,除了他的父母
选B knows应该由No one决定
No one knows where the boy has gone except his parents.