Question

It ________ me ________ see how my neighbours treated their children．

1. A.
   shocked, to
2. B.
   shocked, at
3. C.
   shocks, to
4. D.
   shocks, at

Answer 1

A
后面用treated，所以前面要保持时态一致，用过去时，由be shocked at doing sth．和be shocked to do sth．两个固定结构可知答案。