题目内容：

Nobody but Andy and her sister( )from
A.knows where he is B.knows where is he C know where he is D.know where is he

优质解答

A 是对的.
Nobody but ……用“就远原则”,即动词看but 前面的主语,Nobody 看做第三人称单数,所以动词用knows ,排除C,D.
knows 后面跟的宾语从句用陈述句语序,排除B.