2. 外语
  3. A man escaped from the prison last night. It was a long time______the guards discovered what had happened.

A man escaped from the prison last night. It was a long time______the guards discovered what had happened.

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问题 A man escaped from the prison last night. It was a long time______the guards discovered what had happened.
选项 A、before
B、until
C、since
D、when
答案A
解析 本题为固定用法题。本句意为“昨晚，有人从监狱逃脱了。但是，过了很久警卫才意识到发生了什么”。“It is／was a long time before…”为固定用法，表示“过了很久才……”，故选项A)为正确答案。
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