they worked for a while and _ a rest A,stop to have B,stop having C,stopped to have

问题描述:

they worked for a while and _ a rest A,stop to have B,stop having C,stopped to have
D,stopped having

stop to do sth 停下来去做另外一件事(做的和要做的是两件事)
stop doing sth 停下来正在做的事(一件事)
本题为“工作一会停下来休息”,是两件事,又因为前句是过去式,and 前后连接两个动词短语,或其他词的时候,前后人称,数,时态都要保持一致,所以后面停下来也是过去式,所以选c