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You must that the lights are turned off before leaving. [ ] A.knowB.examineC.che

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You must that the lights are turned off before leaving. [ ] A.knowB.examineC.che

You must _______ that the lights are turned off before leaving.

[]

A.knowB.examineC.checkD.remember

试题答案

答案:C

解析:

此处check表示“核实”,相当于make sure。