____the doctors really doubt is____my mother will recover from the serious disease soon.

 It was said ____that was _____ he succeeded in running his business.

___ surprised me most was ____ he was too late for the important meeting, for he was chairman of it. 

As I looked at the memorial, I thought about ____ terrible disaster it was for the people in Nanjing then and ____ they were to fight the Japanese invaders.

______ he wants to say is ______ great an effort he has made to help her out.

A．That; how         B．What; what        C．What; how        D．What; that