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Don’t forget __________when you finish __________ your computer

Aturning offto use                                     Bto turn it offusing

Cto turn off itto use                                          Dto turn it offto use

1、B

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Don’t forget __________when you finish __________ your computer.

A.turning off;to use                                     B.to turn it off;using

C.to turn off it;to use                                          D.to turn it off;to use

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