单项选择题

Questions 17 to 20 are based on the following passage. At the end of the passage, you will be given 20 seconds to answer the questions. Now listen to the passage. Who was the inventor of chewing gum

A．Thomas Adams.
B．William Wrigley.
C．Both Adams and Wrigley.
D．Unknown.

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单项选择题

单项选择题

Questions 17 to 20 are based on the following passage. At the end of the passage, you will be given 20 seconds to answer the questions. Now listen to the passage. Who was the inventor of chewing gum 您的浏览器不支持 audio 元素。