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This instrument is used machines. A. checking B. to checking C. to check D. to b

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This instrument is used machines. A. checking B. to checking C. to check D. to b

Thisinstrument is used________machines.

A.checking   B.to checking    C.to check    D.to be checked

 

试题答案

答案：C

提示：
beused to do= be used for doing被用来干……。

 

标签：usedmachinesisthisinstrument

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