单项选择题

Questions 14-16 are based on the following passage. You now have 15 seconds to read Questions 14-16.
How many people become infected with malaria each year

A．Over 3 million.
B．Over 7 million.
C．Over 30 million.
D．Over 70 million.

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单项选择题

单项选择题

Questions 14-16 are based on the following passage. You now have 15 seconds to read Questions 14-16. How many people become infected with malaria each year 您的浏览器不支持 audio 元素。