-- It’s 10 o’clock now. I must go.-- It’s raining outside. Don’t leave______ it stops.

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问题 -- It’s 10 o’clock now. I must go.-- It’s raining outside. Don’t leave______ it stops.

选项 A、when
B、while
C、until

答案C

解析 考查固定搭配。not...until.一是固定搭配(也可称为固定表达),指“直到…才…”。when和while都指“同时,当…时”,填入题中明显不合逻辑。
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