Itisbadhabittoleavetheofficewithout

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问题详情:

 Itisbadhabittoleavetheofficewithout

 It is bad habit to leave the office without _______ the lights.

A. closing       B. opening        C. taking off         D. turning off

【回答】

D

知识点:动词和动词短语

题型:选择题

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