单项选择题

My boss gets her messages______ by a computer.

A． take
B． takes
C． taken
D． taking
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单项选择题
Either the product ______the advertisement should be changed.
A． or
B． and
C． but
D． nor
单项选择题
Akinori remained calm ______his anticipation.
A． while
B． in spite of
C． with
D． as
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