单项选择题

Dr. Peter Axt and her daughter agree with all the following EXCEPT ______.

A．fewer free radicals may slow down one's metabolism.
B．high energy activities may cause more diseases.
C．too much exercise may impair one's organs.
D．the feeling of stress may weaken one's immunity.

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单项选择题

Opponents hold that the book ______.

A．is a latest best Seller.
B．clicks with young people.
C．caters to people's psychological needs.
D．might damage people's lives.

单项选择题

All of the following items are mentioned EXCEPT ______.

A．gardening tools.
B．a toothbrush.
C．pants.
D．gifts.