单项选择题

This passage tells us something about ______.

A．how large Australia is
B．why the radio is important in Australia
C．how the radio is used in Australia
D．both[B
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单项选择题
The two-way radio is something like a telephone beacuse ______.
A．the radio has two telephones
B．you can talk to and listen to somebody by radio
C．the boys and girls can listen to somebody by radio
D．people can talk to a doctor hundreds of miles away by radio
单项选择题
Families on the large farms kept in touch with each other by ______.
A．radio
B．a newspaper
C．a bird
D．both［B］ and ［C］
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