单项选择题


A．at
B．on
C．for
D．by
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单项选择题
Soon after the drug ______ effect, the patient became quieter.
A．brought
B．made
C．took
D．released
单项选择题
These foreign tourists tried to ______ a hard bargain with the local peddler.
A．shape
B．force
C．produce
D．drive
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