单项选择题

More people are living in the U.S.A nowadays.

A． Right
B． Wrong
C． Doesn't say
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单项选择题
As to the world population, the public have the same idea as the experts.
A． Right
B． Wrong
C． Doesn't say
单项选择题
The birth rate all over the world will remain the same in the 21st century.
A． Right
B． Wrong
C． Doesn't say
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