单项选择题

It is well-known that the retired workers in our country are ______ free medical care.

A．entitled to
B．involved in
C．associated with
D．assigned to
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单项选择题
To survive in the intense trade competition between countries, we must ______ the qualities and varieties of products we make to the world market demand.
A．improve
B．enhance
C．guarantee
D．gear
单项选择题
Ms. Breen has been living in town for only one year, yet she seems to be ______ with everyone who comes to the store.
A．accepted
B．admitted
C．admired
D．acquainted
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