I was surprised by what she said made me recognize what silly mistakes I had made.A. what

问题补充：

I was surprised by what she said, made me recognize what silly mistakes I had made.

A. what

B. that

C. which

D. Who

答案：

A. what

B. that

(答案→)C. which

D. Who

解析：句意为：他说的话让我很吃惊，这让我意识到自己犯下了多么愚蠢的错误

主句。从主句和从句的关系看，缺成分，用关系代词that或which或who，在限制性定语从句中不用that，再结合句意得出which，which代替前面的整个情况。

考点: 定语从句关系词的考察