单项选择题

A．Twenty years ago.
B．Three hundred years ago.
C．Two centuries ago.
D．At the beginning of the 20th century.
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单项选择题
A．International travel and commerce.B．Lack of efficient public health system.C．Technology in food processing industry.D．Unhealthy eating habits of people.
A．International travel and commerce.
B．Lack of efficient public health system.
C．Technology in food processing industry.
D．Unhealthy eating habits of people.
单项选择题
Bailey has secured a grant to encourage the Tufts’’ chefs to increase the amount of local produce on Tufts’’ campuses.
A．Y
B．N
C．NG
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