[-B42] I was surprised by her words, which made me recognize _____ silly mistakes I had made.

翻译：对于她的话我感到震惊,这使我意识到,我犯了多愚蠢的错误.
which引导的是非限制性定语从句,定语从句中又包含一个宾语从句.
recognize 后面缺宾语,所以是宾语从句.
后面考察的是what和how 感叹句的区别
what +(a/an)+adj+n+主语+谓语+其他成分
how+adj(adv)+主语+谓语+其他成分
_what____ silly mistakes I had made.
形容词 名词 主语 谓语
个人理解,如有错误,请见谅!