单项选择题

Questions 14～17 are based on a radio program. You now have 20 seconds to read Questions 14～17. When did Davis begin this program

A．In 1917.
B．In 1950.
C．In 1965.
D．In 1973.

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单项选择题

单项选择题

Questions 14～17 are based on a radio program. You now have 20 seconds to read Questions 14～17. When did Davis begin this program 您的浏览器不支持 audio 元素。