单项选择题

The nurse is very fired, ______ she is still working very hard.

A． and
B． but
C． so
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单项选择题
I usually buy ______ newspaper on my way to work.
A． an
B． a
C． the
单项选择题
I'm sure it won't work. Can't you come up with a ______ idea
A． best
B． better
C． good
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