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【题目】 Don’t move the desk your teacher allows you.

A. if B. since C. because D. unless

【答案】D

【解析】

试题分析:句意:如果老师不允许,不要自行搬动桌子。A. if如果,表示肯定条件;B. since自从;既然,表示时间或原因;C. because因为,表示原因;D. unless如果不,表示否定条件。根据两句话中需要使用连词,从句使用否定条件。故选D。

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