单项选择题

Either the product ______the advertisement should be changed.

A． or
B． and
C． but
D． nor
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单项选择题
Akinori remained calm ______his anticipation.
A． while
B． in spite of
C． with
D． as
单项选择题
An answering machine takes messages ______Sundays.
A． from
B． at
C． in
D． on
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