单项选择题

It is a good idea for parents to monitor the______as well as the kind of television that their children watch.

A．number
B．size
C．amount
D．screen
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The streets were empty______the policemen on duty.
A．besides
B．except
C．excepting
D．except for
单项选择题
Because of many mistakes, she was made______these letters again.
A．type
B．to typing
C．typed
D．to type
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