单项选择题

Passage Two
Questions 29 to 32 are based on the passage you have just heard.

A．Massachusetts.
B．Texas.
C．California.
D．Connecticut.
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单项选择题
What do we know about the brain from the first paragraph
A．It works much busily during sleep.
B．It rests during sleep just like the body.
C．It keeps us subconscious during sleep.
D．It needs to stop working for hours every day.
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