问题补充:
You must be very tired. Why don’t you a rest?
A. stop having
B. stop to have
C. to stop having
D. to stop to have
答案:
A. stop having
(答案→)B. stop to have
C. to stop having
D. to stop to have
解析:why don’t you 后接动词原形,故将CD排除,然后再看stop to do sth,表示停下原来的事,去做另一件事,而stop doing sth,表示停下正在做的事,通过前文内容You must be very tired,可知是停下去休息,故选动词不定式,故选B