单项选择题

______ one time, Manchester was the home of the most productive cotton mills in the world.

A．On
B．By
C．At
D．Of
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单项选择题
Some old people don' t like pop songs because they can' t ______ so much noise.
A．resist
B．obtain
C．tolerate
D．understand
单项选择题
The medicine is one sale everywhere. You can get it at ______ chemist' s,
A．each
B．some
C．certain
D．any
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