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(2007·黄冈模拟题)

Be sure to ________ the lights before you leave.

[  ]

A.turn
B.turn on
C.turn off
D.turn of

答案:C
解析:

解析:这个句子的意思为:请你在离开前务必________灯。turn on意为“打开 (灯、煤气等)”;而turn off意为“关闭 (灯、煤气等)”。根据本题的逻辑,离开前应该关灯,故正确答案为C。注意:这个短语不能说turn of


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