单项选择题

Why will the population in poorer countries increase

A．Because they need more labor to support the family.
B．Because the people have the habit to have a big family.
C．Because the people there are poorer.
D．Because the people there want to be rich.
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单项选择题
What can we learn about the growth rate of population
A．The total growth rate of world population will increase.
B．The growth rate of population in richer countries will increase.
C．The growth rate of population in poor countries will increase.
D．The total growth rate in American countries will increase.
单项选择题
The last sentence Look after the people and the population will look after itself may probably means ______.
A．watch the people carefully and the population growth rate will drop
B．control the people firmly and the population growth rate will go up
C．take care of the people and the population growth rate will rise
D．take care of the people and the population growth rate will go down
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