单项选择题

I got a new battery for my recorder only last week, but it seems to have ______ already.

A．worn out
B．run down
C．knocked off
D．gone off
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单项选择题
We have a firm belief that he will abide by his promise if he gives it to anyone.
A．avenge
B．stick to
C．attribute to
D．automate
单项选择题
The night was so ______ that not a sound could be heard.
A．quiet
B．beautiful
C．dark
D．dangerous
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