we should exploit the Antarctic’s natural resources is open to discussion.A. WhatB. Whethe

问题补充：

we should exploit the Antarctic’s natural resources is open to discussion.

A. What

B. Whether

C. If

D. That

答案：

A. What

(答案→)B. Whether

C. If

D. That

解析：考查主语从句。引导主语从句时，使用Whether不用If，句意：是否我们应该开发南极的自然资源在公开讨论。故选B。