单项选择题

A．it
B．those
C．one
D．that
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单项选择题
From where will the researcher get the permission for the new drug
A．The American Government.
B．The City Hospital
C．The Medical Research Institute
D．The U. S. Food and Drug Administration.
单项选择题
A．mediumB．moderateC．temperateD．gentle
A．medium
B．moderate
C．temperate
D．gentle
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