The teacher won’t begin the class all the students .A. until ; stop to talkB. until; stop

问题补充：

The teacher won’t begin the class all the students .

A. until ; stop to talk

B. until; stop talking

C. if; stop to talk

D. if ; stop talking

答案：

A. until ; stop to talk

(答案→)B. until; stop talking

C. if; stop to talk

D. if ; stop talking

解析：此题考查了两个知识点“not...until”意为“直到...才”和“stop to do sth”与“stop doing sth”的区别。