单项选择题

Doctors in this hospital have successfully ______ 100 surgical treatments to remedy those suffering nearsightedness.

A．illuminated
B．plunged
C．administered
D．specified
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单项选择题
Our research has focused on a drug which is so ______ as to be able to change brain chemistry.
A．influential
B．powerful
C．monstrous
D．rigorous
单项选择题
The pursuit was ______ when it was clear that we had won the day.
A．called for
B．called forth
C．called off
D．called up
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