单项选择题

You ______ park here. It's an emergency exit for the fire brigade.

A．mustn't
B．needn't
C．wouldn't
D．oughtn't
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单项选择题
The outline of the figure was barely ______ in the darkness.
A．susceptible
B．invisible
C．perceptive
D．perceptible
单项选择题
Nobody came to see me while I was out, ______
A．did they
B．didn't they
C．did she
D．did he
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