单项选择题

A．It ha been proven to be the best pain-killer.
B．It is a possible cure for heart disease.
C．It can help lower high body temperature effectively.
D．It reduces the chance of death for heart surgery patients.
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单项选择题
A．People would not buy more food than was necessary.B．Food was delivered to people two or three times a week.C．People had effective ways to preserve their food.D．Food was sold fresh and did not get rotten easily.
A．People would not buy more food than was necessary.
B．Food was delivered to people two or three times a week.
C．People had effective ways to preserve their food.
D．Food was sold fresh and did not get rotten easily.
单项选择题
A．Her colleagues.B．Her neighbors.C．Her friends.D．Her schoolmates.
A．Her colleagues.
B．Her neighbors.
C．Her friends.
D．Her schoolmates.
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