单项选择题

During the past years the __ of automobile accidents in New York City has decreased.

A．degree
B．quantity
C．number
D．amount
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单项选择题
Since we are exchanging ______, I too have a secret to reveal, said Mary.
A．transferences
B．transactions
C．confidences
D．promises
单项选择题
It was very difficult to build a power station in the deep valley, but it ______ as we had hoped.
A．came off
B．went off
C．brought out
D．made out
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