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 “It is/was a long time before…”为固定搭配,意为“过了很久才……”。故选项A为正确答案。
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本试题收录于: 英语题库普高专升本分类
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