The trouble is ___i have lost his address A,What B,Whether C,that D,Who

问题描述:

The trouble is ___i have lost his address A,What B,Whether C,that D,Who
请问为何选C麻烦解释下

is 后面引导的是表语从句,用什么主要看后面从句有没有缺什么成分,而这个句子中我已经丢了他的地址,这是一句完整的句子,所以就用that的引导,而且这个that不能省略.如果主句缺成分的话,物就用what,人就用who,比如说the trouble is who i need to meet ,the trouble is what to do with money ,the trouble is that i don't know how to deal with this problem