单项选择题

You should take more physical ______ . Don't always sit at the desk doing your

A．exercise, exercises
B．exercise, exercise
C．exercise, exercise
D．exercises, exercises
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单项选择题
What color ______ her ______
A．is, clothes
B．are, clothes
C．is, cloths
D．are, cloths
单项选择题
As we know, Galieo invented ______ telescope.
A．×
B．the
C．a
D．one
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