单项选择题

The dentist has decided to extract her bad tooth.

A．take out
B．repair
C．push in
D．dig
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单项选择题
It's prudent to start any exercise program gradually at first.
A．workable
B．sensible
C．possible
D．feasible
单项选择题
Medical facilities are being upgraded.
A．renewed
B．repaired
C．improved
D．increased
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