What is the main topic of the passage？
A. Energy conservation.
B. Transportation of the future.
C. Strip cities.
D. Advantages of air transportation over railroads.
查看答案
From the passage we can infer that
A. electronic mail will soon play a dominant role in transmitting messages.
B. it will become more difficult for people to keep secrets in an information era.
C. people will spend less time holding meetings or conferences.
D. events will be reported on the spot mainly through satellites.
正确答案是（）
A. source
B. cause
C. movement
D. reason
正确答案是（）
A. react
B. reflect
C. reduce
D. repel
正确答案是（）
A. like
B. for
C. as
D. that
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