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

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

【答案】D

【解析】

試題分析：句意：如果老師不允許，不要自行搬動桌子。A. if如果，表示肯定條件；B. since自從；既然，表示時間或原因；C. because因為，表示原因；D. unless如果不，表示否定條件。根據(jù)兩句話中需要使用連詞，從句使用否定條件。故選D。

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