We gave away bulletins door to door to call on people to help others warm-heartedly, only

We gave away bulletins door to door to call on people to help others warm-heartedly, only to have a drink from time to time.
A. to stop
B. stopping
C. stopped
D. having stopped

A. to stop(答案→)B. stoppingC. stoppedD. having stopped解析：考查非谓语动词。句义：我们挨家挨户的发小报是为了号召人们热心助人，时不时的停下来喝点东西。排除C，因为主语we和动词stop之间不是被动关系；排除D，having done是doing的完成式，强调先于谓语动词发生，而本题是分发小报的同时，和停下来喝水是同时的；Only to do表意外结果，doing表主动且同时进行，所以排除A，而B正确。

就是这个解释