单项选择题

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

A．its vacuum tubes.
B．Its electronic circuits.
C．Computer programs.
D．All of the above.
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单项选择题
A．In the army.B．In his hometown.C．At home.D．In California.
A．In the army.
B．In his hometown.
C．At home.
D．In California.
单项选择题
A．Buses and trains are too crowded.B．A person can move around freely.C．It is easy to maintain cars.D．A driver is usually safe in his ear.
A．Buses and trains are too crowded.
B．A person can move around freely.
C．It is easy to maintain cars.
D．A driver is usually safe in his ear.
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