单选题
The teacher didn't begin the class ______ all the students_______.
A、
until, stopped to talk
B、
before, stopped talking
C、
while, stopped to talk
D、
because, stopped talking
【正确答案】
B
【答案解析】
[解析] 考查非谓语动词做宾语。根据句子意思，要停止的是talk这个动作，所以要用stop talking形式，排除[A]和[C]； [D]选项中 because不符合题意。
提交答案
关闭