单项选择题

They are well （）with each other since they once studied in the same university.

A．identified
B．recognized
C．acknowledged
D．acquainted

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单项选择题
It's a pleasure for him to （）his energy and even his life to research work.

A．dedicate
B．dictate
C．decorate
D．direct
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For many patients, institutional care is the most （）and beneficial form of care.

A．persistent
B．appropriate
C．thoughtful
D．sufficient
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