单项选择题

I was always taught that it was ________ to interrupt.

A．rude
B．coarse
C．rough
D．crude
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单项选择题
I think we need to see an investment, ________ before we make an expensive mistake.
A．guide
B．entrepreneur
C．engagement
D．assessor
单项选择题
Rumours are everywhere spreading fear, damaging reputations, and turning calm situations into ones.
A．turbulent
B．tragic
C．vulnerable
D．suspicious
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