单项选择题

A．They are the parents of young children.
B．They are professional storytellers.
C．The stories will help them improve their vocabulary.
D．The stories are required for a course.
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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.
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.
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.
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