问题补充:
)When the teacher came in, the students at once.
A. stopped to talk
B. stopped talking
C. stoped talking
D. stoped to talk
答案:
A. stopped to talk
(答案→)B. stopped talking
C. stoped talking
D. stoped to talk
解析:stop后接不定式表示停下来去做某事,接动名词表示停止正在做的事情。句意:当老师进来时,学生们立即停止了说话。结合语境可知是停止正在进行的动作,选项C,stop变过去时态有误,故选B。