Question

7. ________nothing to do with us. A.What she did have B.What she did is C.What did he do has D.What

Answer 1

首先，have nothing to do 是固定用法，因此必须要有have。这个句子本身 并不是一个问句，而是以一个what引导的从句作主语，因此，无需将助动词提前，显然，答案就应该是A.

追问

不好意思，刚没发全，原题是：7. ________nothing to do with us.
　A.What she did have 　　　　　　 B.What she did is
　C.What did he do has　　　　　　 D.What she has done has
老师说选D，我没搞清楚为什么，可以说说所用的语法吗？

追答

同样的道理，BC可以排除，剩下的两项是主谓搭配关系的不同，名词性从句作主语，谓语动词应该用第三人称单数形式，因此选D。
做这道题，主要是要找出重点，绕开时态问题，因为时态的影响不大，两种时态都可以用。

Answer 2

B，她做的事情与我们没关系

Answer 3

what she did has nothing to do with us 固定用法

Answer 4

what she did has nothing to do with us