单项选择题

According to the interview, how many people have been added to the Earth’s population in the past century

A．80 million
B．60 million
C．50 million
D．40 million
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单项选择题
A．one, oneB．one, twoC．two, twoD．two, one
A．one, one
B．one, two
C．two, two
D．two, one
单项选择题
A．America.B．Australia.C．Asia.D．Europe.
A．America.
B．Australia.
C．Asia.
D．Europe.
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