单选题The teacher won’t begin&n

问题补充：

单选题Theteacherwon’tbegintheclass______allthestudents______.A.until ; stop to talkB.until; stop talkingC.if; stop to talkD.if ; stop talking

答案：

B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。