单项选择题

Bicycling and jogging are good exercise to train one’’s heart because they________.

A．require a lot of strength
B．are more interesting
C．can reduce one’’s weight
D．bring one’’s heartbeat to at least 120 a minute
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In history hostility to Gypsies in Europe resulted in their persecution by all the following EXCEPT
A． the Egyptians.
B． the state.
C． the church.
D． the Nazis.
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A common characteristic of artists and scientists involved in creative work is that
A． they care about the possible reaction to their work.
B． public response is one of the primary concerns.
C． they are keenly aware of public interest in their work.
D． they are indifferent toward response to their work.
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