问题描述: It is wise not to pretend to know___ you don't know.A.that B.whatwhy? 1个回答 分类:英语 2014-09-28 问题解答: 我来补答 B.what 引导宾语从句,作为know的宾语; that是引导定语从句的,所以不能选 展开全文阅读