单项选择题

According to the passage, meat will completely disappear in the future because ______.

A．people have to spend too much time and energy to produce it
B．too much grain protein is needed to produce it
C．it contains too much fat and protein
D．it is not good to the health
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单项选择题
Why does the writer say that the American society today is an impersonal society (last paragraph)
A．Because American people do not like to talk to each other.
B．Because the society does not have small communities now.
C．Because not many people say "hello" to each other when they meet.
D．Because people no longer maintain close relations with each other.
单项选择题
In this passage, artificial food refers to food made from ______.
A．milk
B．grain
C．protein
D．soybeans
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