单项选择题

A．Personal.
B．Objective.
C．Spoken.
D．Written.
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单项选择题
A．Nitrate is a kind of substance used to preserve color in meats.B．Drugs are given to animals not always for medical reasons.C．Most human illnesses are probably caused by the food we eat.D．Forty percent of colon cancer is caused by our diet.
A．Nitrate is a kind of substance used to preserve color in meats.
B．Drugs are given to animals not always for medical reasons.
C．Most human illnesses are probably caused by the food we eat.
D．Forty percent of colon cancer is caused by our diet.
单项选择题
A．A popular TV program.B．A breakthrough in technology.C．A decent purchase.D．A new electronics store.
A．A popular TV program.
B．A breakthrough in technology.
C．A decent purchase.
D．A new electronics store.
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