---I feel tired and sleepy.-Why not stop?A. restingB. lyingC. to relaxD. to work

问题补充：

---I feel tired and sleepy.

---Why not stop?

A. resting

B. lying

C. to relax

D. to work

答案：

A. resting

B. lying

(答案→)C. to relax

D. to work

解析：stop后接动名词表示停止正在做的事情，接不定式表示停下正做的事情来做另一间事情。Rest休息；lie躺着；relax放松；work工作；句意：感到又累又困。——为什么不停下来放松一下？故选C。