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
He gave a talk ______ modern music.
A．after
B．in
C．about
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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