单项选择题

Questions 11～13 are based on a talk about the problem of rising population. You now have 15 seconds to read Questions 11～13.
According to the speaker, how many people have been added per year to the present population

A．80 million.
B．70 million.
C．More than 3 500 million.
D．About 3 000 million.

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Questions 11～13 are based on a talk about the problem of rising population. You now have 15 seconds to read Questions 11～13. According to the speaker, how many people have been added per year to the present population 您的浏览器不支持 audio 元素。