单项选择题

A．Because it changes color in a regular 24-hour rhythm.
B．Because it changes color in response to the sun’s rays.
C．Because it constantly changes color.
D．Because it changes color every hour.
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单项选择题
A．He can’t find his new building.B．He’s not satisfied with the big apartment.C．He’s not accustomed to the large building.D．He’s having a hard time finding an apartment.
A．He can’t find his new building.
B．He’s not satisfied with the big apartment.
C．He’s not accustomed to the large building.
D．He’s having a hard time finding an apartment.
填空题
People should take business ______ into consideration when they spend money on new technology.
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