单项选择题

When her rival died, she ______a grief she did not feel.

A．counteracted
B．counterchecked
C．counterfeited
D．counterchanged
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单项选择题
It can be said that the people who first started the quiet drug revolution are ______.
A．doctors
B．government officials
C．AIDS patients
D．pharmacologists
单项选择题
The passage is written for the purpose of______.
A．explaining the difference between natural and man-made radiation
B．amusing concern about the risks with the use of producers of low-level radiation, like medical X rays
C．advocating limiting the use of atomic weapon testing
D．publicizing the results of a recent British medical survey
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