单项选择题

The underlined words "an activity" in the context refers to ______.

A．reading
B．grammar-learning
C．watching TV
D．writing
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单项选择题
Which of the following is true according to the passage
A．All the literary works can improve the readers' language, grammar and rhetoric.
B．Watching TV is not passive since it let watchers experience the sensation.
C．The literature remains not affected by TV in America.
D．Jerry Mander suggests that people should ban television to some extent.
单项选择题
Which one of the following, according to the author was first discovered or invented in human civilization
A．Weapons.
B．Oral language.
C．Fire.
D．Gunpowder.
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