When the teacher came in the students stopped and became very .A. to talk quietB. talki

问题补充：

When the teacher came in, the students stopped and became very .

A. to talk, quiet

B. talking, quiet

C. to talk, quietly

D. talking, quietly

答案：

A. to talk, quiet

(答案→)B. talking, quiet

C. to talk, quietly

D. talking, quietly

解析：句意：当老师进来时学生们停止交谈，并变得非常安静。stop doing st 停止做某事，停止正在做的事，stop to do sth,停下来去做某事，即停止正做的事去做另外一件事。become,变得……，半系动词，后加形容词。quiet,安静的，形容词，quietly,安静地，副词。故选B。