B,停下来休息一下,考stop to do stop doing 区别参考如下
stop to do　停止,中断做某事后去做另一件事.
stop doing　停止做某事.
　　They stop to smoke a cigarette.他们停下来,抽了根烟.
　　I must stop smoking.我必须戒烟了.
典型例题
She reached the top of the hill and stopped ___　on a big rock by the side of the path.
A.to have rested　B.resting　 C.to rest　D.rest
答案：C.由题意可知,她到了山顶,停下来在一个路边的大石头上休息.因此,应选择"stop to do sth.停下来去做另一件事".而不仅仅是爬山动作的终止,所以stop doing sth.不正确.