单项选择题

Doctors are required to keep patients' records completely ______.

A．acute
B．invalid
C．confidential
D．deliberate
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单项选择题
The winery was started by an Italian ______ to California.
A．exile
B．immigrant
C．migrant
D．emigrant
单项选择题
This program ______ computer files so they can be easily sent by email.
A．suppresses
B．compresses
C．presses
D．impresses
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