单项选择题

To communicate with friends, nearly half of the college students use ______.

A．telegraphs
B．telephones
C．emails
D．letters
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单项选择题
From the third paragraph we can find that in the US ______.
A．cell phones will take the place of computers in colleges
B．college students can have a computer from their colleges
C．most college students are from rich families
D．mobile phones make Internet life easy for college students
单项选择题
It was in that year ______ the American astronauts succeeded______landing on the moon.
A．when, on
B．that, on
C．when, in
D．that, in
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