单项选择题

A．The first group.
B．The second group.
C．The last group.
D．All the three groups.
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单项选择题
A．Man is also a kind of animal.B．There have been men for more than a million years.C．Like any other animals, man slowly changed through time.D．There were men a few million years ago.
A．Man is also a kind of animal.
B．There have been men for more than a million years.
C．Like any other animals, man slowly changed through time.
D．There were men a few million years ago.
单项选择题
A．Nuclear power stations are not safe.B．It’s too expensive to utilize nuclear power.C．The country has already a sufficient supply of electricity.D．Other sources of energy are more readily available.
A．Nuclear power stations are not safe.
B．It’s too expensive to utilize nuclear power.
C．The country has already a sufficient supply of electricity.
D．Other sources of energy are more readily available.
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