单项选择题

In _________ between commercial parties, the constraints are usually non-existent or vague.

A．transactions
B．transmissions
C．transitions
D．transformations
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单项选择题
He held onto the _________ belief that this could solve all the problems of this area straight away.
A．nasty
B．obscure
C．naive
D．offensive
单项选择题
The latest outbreak of violence is a clear _________ of discontent in the city.
A．implementation
B．manifestation
C．demonstration
D．expedition
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