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A．When the season changes.
B．When the food colour changes.
C．When they move to different places.
D．When they are attracted by different smells.
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A．They are very easy to read. B．They are cheap and popular. C．They are translated into English. D．They are convenient for the users.
A．They are very easy to read.
B．They are cheap and popular.
C．They are translated into English.
D．They are convenient for the users.
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A．Different Forms of Exercise B．Exercise—The Road to Health C．Running—A Popular Form of Sport D．Scientific Evidence of Health Benefits
A．Different Forms of Exercise
B．Exercise—The Road to Health
C．Running—A Popular Form of Sport
D．Scientific Evidence of Health Benefits
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