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An Exchange of Customs and Etiquettes
(A) The B0......

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单项选择题
If we want to feed the world's population in 2050, our food production needs ______.
A．to increase by 30 percent
B．an increase of 300 percent
C．to increase to 3 billion tons per year
D．an increase of three times
单项选择题
It can be inferred from the passage that ______.
A．it is estimated that there will be no food produced by conventional agriculture
B．people haven't been aware of the health benefits of reduced pesticide use
C．a genetic revolution will be one of methods to increase food supplies
D．GM food will be too expensive for people to accept
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