单项选择题

What is the major function of paragraph 1（）

A．To arouse the reader's concern.
B．To introduce the theme of the whole passage.
C．To summarize the whole passage.
D．To state the primary uses of TV.

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单项选择题
During REM,（）.

A．your eyes move quickly
B．you dream
C．you are restless
D．both A and B
单项选择题
The average number of hours of sleep that an adult needs is（）

A．approximately six hours
B．around ten hours
C．about eight hours
D．not stated here
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