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Questions 14 ～ 16 are based on the following talk. You now have 15 seconds to read Questions 14 ～ 16.
How many people worldwide have been infected with HIV since the start of the epidemic

A．47 million.
B．4 billion.
C．25 million.
D．44 million.

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单项选择题

单项选择题

Questions 14 ～ 16 are based on the following talk. You now have 15 seconds to read Questions 14 ～ 16. How many people worldwide have been infected with HIV since the start of the epidemic 您的浏览器不支持 audio 元素。