题目

“When did he leave the classroom?” “He left _______ you turned back to write on the blackboard.” A. the time     B. the moment C. until   D. since 答案：B。 解析: the moment 用作连词，意为“一……就……”，相当于 as soon as。类似地，the minute, the instant 也可用作连词，表示“一……就……”的意思。

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