The teacher didn’t begin the class ______ all the students ______.

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问题 The teacher didn’t begin the class ______ all the students ______.

选项 A、until, stopped talk
B、before, stopped talking
C、while, stopped to talk
D、because, stopped talking

答案B

解析 本题考查动词的用法。Stop doing sth. 的意思是“停止做某事”,而stop to do sth. 的意思是“停下来去做某事”,所以本题应该选stopped talking。此外,根据本句的句意“老师等所有的学生停止讲话才开始上课”,本题应该选until或before。根据这两点,此题答案为[B]。
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