问题:
_____ 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.Thathow
D.Whether; whether
_____ 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.Thathow | D.Whether; whether |
参考答案: