William Wrigley first started to experiment with chewing gum. Following the success of chewing gum, schools handed out gum to s

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问题 William Wrigley first started to experiment with chewing gum.
Following the success of chewing gum, schools handed out gum to school children.

选项 A、Right
B、Wrong
C、Not mentioned

答案C

解析

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职称英语卫生类C级

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