一道专四的题After( )seemed an endless wait,it was her turn to step into the doctor's office.
问题描述：
一道专四的题After( )seemed an endless wait,it was her turn to step into the doctor's office.
A.it B.that C.what D.which
正确答案是what
为什么不能选that?
答
after接的是一个状语从句,如果选择that的话,由于从句缺少主语,出错.选what的话,在从句里面做主语,构成一下完整的从句.整句意思:度过了好像没有终止的等待之后,她终于被轮到去医生的办公室.