单项选择题

You tell anybody about this — it's a secret.

A．can't
B．mustn't
C．needn't
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单项选择题
______, the stronger the wind is.
A．The brighter the sun is
B．The harder it is raining
C．The faster the air is moving
单项选择题
--Why do you go to work on foot ______ That doesn't seem to save your time. --To get more exercise and keep healthy.
A．all the time
B．at times
C．from time to time
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