单项选择题

A．Because it reduces one’’s anxiety.
B．Because it increases the amount of carbon dioxide in the lungs.
C．Because it makes one strong.
D．Because it brings down the heart rate.
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单项选择题
The statement The business of America is business probably means ________ .
A．The business institutions in America are concerned with commerce
B．Business problems are of great importance to the American government
C．Business is of primary concern to Americans
D．America is a great power in world business
单项选择题
It can be inferred from the passage that ______.
A．other referees were showing great interest in following Savill’’s example
B．the audiences were greatly impressed by Savili’’s sympathy in the game
C．a game will be stopped if the ball strikes the referee any time during the game
D．it was Savill’’s "sense of humor" that made him suspended by the association
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