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.
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单项选择题
A．The sadness of being involved in accidents.B．Ways to limit the use of private cars.C．The serious pollution on motor roads.D．Freedom to travel quickly and safely.
A．The sadness of being involved in accidents.
B．Ways to limit the use of private cars.
C．The serious pollution on motor roads.
D．Freedom to travel quickly and safely.
单项选择题
A．Student to faculty ratio is big.B．Students are critical to professors.C．Good professors and small-scale classes.D．The students’ scores are surprising.
A．Student to faculty ratio is big.
B．Students are critical to professors.
C．Good professors and small-scale classes.
D．The students’ scores are surprising.
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