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
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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
单项选择题
Why may GM foodstuffs be liked by people in the future
A．Because they will be cheaper than conventional foodstuffs.
B．Because they will remove people's worries about taking many chemicals.
C．Because it will be more convenient for people to get them.
D．Because conventional foodstuffs will not be available in the future.
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