单项选择题

A．MIT.
B．Reed College.
C．Harvard.
D．Yale.
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单项选择题
A．A housewife.B．A singer.C．A teacher.D．A musician.
A．A housewife.
B．A singer.
C．A teacher.
D．A musician.
单项选择题
A．Lack of vitamins is the main cause of skin cancer.B．New research proves that sunbathing causes no problems at all.C．The danger of the sunshine has been ignored because of its benefits.D．Proper exposure to the sun can contribute a lot to our health.
A．Lack of vitamins is the main cause of skin cancer.
B．New research proves that sunbathing causes no problems at all.
C．The danger of the sunshine has been ignored because of its benefits.
D．Proper exposure to the sun can contribute a lot to our health.
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