单项选择题


Questions 33 to 35 are based on the passage you have just heard.

A．At least once a month.
B．At least twice a month.
C．At least once a year.
D．At least twice a year.
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单项选择题
A．A disease.B．A cause of fatal plague.C．A substance in a flea’s legs.D．The substance that a flea lives on.
A．A disease.
B．A cause of fatal plague.
C．A substance in a flea’s legs.
D．The substance that a flea lives on.
单项选择题
A．Noblemen centuries ago did not like traveling.B．Heredity is not the only thing that influences our color,C．Exposure to sunlight is the only thing that determines skin color.D．Having a tan is considered a sign of wealth nowadays in North America.
A．Noblemen centuries ago did not like traveling.
B．Heredity is not the only thing that influences our color,
C．Exposure to sunlight is the only thing that determines skin color.
D．Having a tan is considered a sign of wealth nowadays in North America.
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