单项选择题

Mr. Morgan can be very sad ______ , though in public he is extremely cheerful.

A．by himself
B．in person
C．in private
D．as individual
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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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