I am sure _______ he will come here tomorrow . But I am not sure ________ he will help you when he comes here .

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

 I am sure _______ he will come here tomorrow . But I am not sure ________ he will help you when he comes here .

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

I am sure _______ he will come here tomorrow . But I am not sure ________ he will help you when he comes here .

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

I’m not sure ______ he will come tomorrow.
A. that                    B. if                  C. when

I’m not sure ______ he will come tomorrow.

A. that B. if C. when