单项选择题

Questions 11 to 13 are based on the following passage. At the end of the passage, you will be given 15 seconds to answer the questions.
Luther L. Terry is ______

A．a doctor of medicine
B．the Surgeon General of USA
C．a doctor of a health center
D．a head of a tobacco company

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单项选择题

单项选择题

Questions 11 to 13 are based on the following passage. At the end of the passage, you will be given 15 seconds to answer the questions. Luther L. Terry is ______ 您的浏览器不支持 audio 元素。