The new machine, if properly, will work for at least ten years. A. use B. using C. being used D. used 【查看更多】

 

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The new machine, if 　　　 properly, will work for at least ten years.

A. used       B. use       C. using          D. being used

 

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 The new machine, if 　　　 properly, will work for at least ten years. 

A. used  B. use     C. using  D. being used

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