单项选择题

Very few scientists _________ completely new answers to the world’s problems.

A．come up with
B．come out
C．come round
D．come up to
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单项选择题
She is very _________ upsetting her husband, as he has a violent temper.
A．tired of
B．wary of
C．keen on
D．confined to
单项选择题
You must phone the police when you find any suspicious guy _________ the house late at night.
A．hanging out
B．hanging up
C．hanging round
D．hanging together
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