单项选择题

Passage One Questions 26 to 28 are based on the passage you have just heard.

A．Strip-cities.
B．Transportation of the future.
C．Energy conservation.
D．Advantages of air transportation over railroads.
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单项选择题
A．To check out some books from the library.B．To apply for a new library card.C．To return some business books.D．To find out where the art books are located.
A．To check out some books from the library.
B．To apply for a new library card.
C．To return some business books.
D．To find out where the art books are located.
填空题
______ is strongly concerned with environmental issues.
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