--- Do you doubt ____ he’ll be fired by the school?    

--- No, not a bit. But I doubt ____ he will bury himself into study.

A．that; that          B．whether; /         C．if ; that           D．that; whether

Do you doubt______ he’ll leave all his money upon his death to his mother school?

A. whether        B. that          C. if             D. which

--- Do you doubt ____ he’ll be fired by the school?    
--- No, not a bit. But I doubt ____ he will bury himself into study.

Do you doubt______ he’ll leave all his money upon his death to his mother school?

A. whether        B. that          C. if             D. which

Do you doubt ________ he comes here on time?

1. A.
   that
2. B.
   whether
3. C.
   how
4. D.
   when