单项选择题

The medical team ______ a breakthrough in their research on the treatment of cancer.

A．knew
B．did
C．made
D．gave
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单项选择题
There is concern ______ residents in the area about the effect the development will have on the local environment.
A．by
B．towards
C．among
D．without
单项选择题
Mr. Nomura's generous salary package is ______ for an employee of his experience and ability.
A．appropriate
B．contagious
C．widespread
D．stubborn
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