单项选择题

From the passage we learn that human brains______.

A．improved the art of speech exclusively
B．developed only with the use of tools
C．and art of speech had a mutual improvement
D．reached the present size about a few hundred years ago

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单项选择题

According to the author, what might be the conventional democracy for students

A．Students are free to select TV programs.
B．Students are supposed to involve in national and community responsibility.
C．Students are free with their brand choice.
D．Students are free in selecting schools.

单项选择题

It can be inferred from the passage that students' attitude towards campus commercials is that they think______.

A．the issue is more about freedom.
B．it is more conflicting than common.
C．education becomes a billboard.
D．that they must investigate more.