when class is over,the students stop ____ 1.had a rest 2.having a rest 3.have a rest4.to have a rest
问题描述：
when class is over,the students stop ____ 1.had a rest 2.having a rest 3.have a rest
4.to have a rest
答
4 to have a rest.
stop to do sth停下来去做某事
stop doing sth 正在做，停下了
答
2
考试结束就应该是停止答题。
答
4
答
4
stop to do 停下来做...
stop doing 停止
根据意思“下课时，同学们就停下来休息一下 ”