My mother is interested in _____I have told her. A.that B.all that C.all which D.all what答案为什么

Question

这是什么从句，为什么不选C和D呢？

Answer 1

all 後面只能跟that，这是搭配的问题，没有all which的用法。all that=what.句子可以写成 my mother is interested in what I have told her也是可以的。这里的what在主句中做的的宾语，在从句裏呢也是做双宾语（her是一个，what是另外一个）的另外一个宾语。all和what都可以做宾语，所以有all就不用what啦。Satisfied？