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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单项选择题
The news quickly spread through the village_________ the war had ended.
A．which
B．what
C．that
D．where
单项选择题
The difference between the control group and the experimental group was_________.
A．the training that parents received
B．the age of the children
C．tile books that were read
D．the number of the children
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