单项选择题

The basic causes are unknown, although certain conditions that may lead to cancer have been ______.

A．identified
B．guaranteed
C．notified
D．conveyed
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单项选择题
Please do not be ______ by his had manners since he is merely trying to attract attention.
A．disgusted
B．embarrassed
C．irritated
D．shocked
单项选择题
I hope you are not ______ that I obtained this money dishonestly.
A．implying
B．involving
C．deducing
D．denoting
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