You must be tired now. Why not to have a rest?A. to stoppingB. to stopC. stopD. stopping

问题补充：

You must be tired now. Why not to have a rest?

A. to stopping

B. to stop

C. stop

D. stopping

答案：

A. to stopping

B. to stop

(答案→)C. stop

D. stopping

解析：句意：你现在一定累了，为什么不停下来休息一下。Why not 为什么不，后面跟动词原形；stop doing sth. 停止做某事；stop to do sth.停下来去做某事。故选C。