_____ life will continue on the earth for millions of years to come will depend on ______this problem can be solved.

A. Whether; that    B.That; why  C. That    how   D. Whether; whether

_____ life will continue on the earth for millions of years to come will depend on ______this problem can be solved.

Whether life will continue on the earth for millions of years ______will depend on ____this problem can be solved.

   A. to come; if       B. coming; if         C. to come; whether   D. coming; whether

Whether life will continue on the earth for millions of years ______will depend on ____this problem can be solved.

1. A.
   to come; if
2. B.
   coming; if
3. C.
   to come; whether
4. D.
   coming; whether

Whether life will continue on the earth for millions of years ______will depend on ____this problem can be solved.

   A. to come; if       B. coming; if         C. to come; whether   D. coming; whether