the Games will be held in Beijing is not known. A. WheneverB. IfC. WhetherD. That

问题补充：

the Games will be held in Beijing is not known.

A. Whenever

B. If

C. Whether

D. That

答案：

A. Whenever

B. If

(答案→)C. Whether

D. That

解析：主要测试主语从句。分析句子结构可知句子 the Games will be held in Beijing中需要连接词，而且表示态度不确定的情况；另外结合所给答案可知译文为：运动会知否将在北京举行还不为人所知。所以选择C最佳。