31．-Don’t forget to all the computers before you leave the computer room． 一No.1 won’t A．turn on B.turn off C．turn down D.turn up 【查看更多】

 

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－Don’t forget to ________ all the computers before you leave the computer room．

－I won’t．

[　　]

A．turn on

B．turn off

C．turn down

D．turn up

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