单项选择题

Medical facilities are being upgraded.

A．expanded
B．repaired
C．improved
D．transferred
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单项选择题
A lot of people could fall ill after drinking contaminated water.
A．boiled
B．polluted
C．mixed
D．sweetened
单项选择题
It's sensible to start any exercise program gradually at first.
A．workable
B．reasonable
C．possible
D．available
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