We don’t doubt ____ he’ll give us much help. _____ we doubt is _____ he’ll come on time

We don’t doubt ____ he’ll give us much help. _____ we doubt is _____ he’ll come on time

1. A.
   whether, That, when
2. B.
   that, What, whether
3. C.
   whether, What, whether
4. D.
   that, Why, whether

We don’t doubt ____ he’ll give us much help. _____ we doubt is _____ he’ll come on time

A. whether, That, when                 B. that, What, whether

C. whether, What, whether               D. that, Why, whether

We don’t doubt ____ he’ll give us much help. _____ we doubt is _____ he’ll come on time

We don't doubt ________ he'll give us much help. ________ we doubt is ________ he'll come on time.

[　　]

A．whether; That,when

B．that, What, whether

C．whether , What , whether

D．that , Why , whether