单项选择题

A．They help people save time on housework.
B．They go into the garbage heap.
C．They are harmful to the environment.
D．They make products more expensive.
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单项选择题
A．The northern reasons for the war.B．To preserve democracy.C．To determine the future of democracy throughout the world.D．The only way for the nation to survive.
A．The northern reasons for the war.
B．To preserve democracy.
C．To determine the future of democracy throughout the world.
D．The only way for the nation to survive.
填空题
The second paragraph of the passage focuses on the possible use of computers in ______.
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