They didn’t stop talking ______ their teacher came back.

admin2009-07-17  27

问题 They didn’t stop talking ______ their teacher came back.

选项 A、until
B、while
C、as soon as

答案A

解析 not...until表示“直到……才”。全句意为“他们直到老师回来才停止说话”。
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