单项选择题

A．Take more frequent breaks.
B．Improve his computer skills.
C．Drink more coffee.
D．Go to see an eye doctor.
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单项选择题
A．Buses.B．Bicycles.C．Showers.D．Schools.
A．Buses.
B．Bicycles.
C．Showers.
D．Schools.
单项选择题
A．Stricter standards for food preparation.B．More detailed labels on food.C．Removing certain foods from the market.D．Regular testing of food products.
A．Stricter standards for food preparation.
B．More detailed labels on food.
C．Removing certain foods from the market.
D．Regular testing of food products.
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