It remains to be seen the newly formed committee’s policy can be put into practice.A. that

问题补充：

It remains to be seen the newly formed committee’s policy can be put into practice.

A. that

B. which

C. what

D. whether

答案：

A. that

B. which

C. what

(答案→)D. whether

解析：考查主语从句的引导词。句意：新成立的委员会的政策能否被贯彻实施还拭目以待。从结构判断主语从句不缺少成分，所以B，C两项排除，如果使用A选项 that句意不通顺，所以使用连词whether 。正确选项为D。