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---Look at the machine in the corner. I haven’t seen it before.
---It ________ examining the patient.

A．used to B．used for
C．is used to D．is used for

D

解析試題分析：句意：-看看角落里的機(jī)器，我以前沒(méi)有看到過(guò)它。-它是用來(lái)檢查病人的。be used to do sth="be" used for doing /sth被用來(lái)做······，be used to doing sth 習(xí)慣于做······，used to do sth,過(guò)去常常做某事。結(jié)合句意，故選D。
考點(diǎn)：考查動(dòng)詞詞組用法。

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