单项选择题

Questions 17～20 are based on the following passage. You now have 20 seconds to read questions 17～20. What is the passage mainly about

A．The American Revolution.
B．John Hancock’s handwriting.
C．How an American expression began.
D．Signing the Declaration of Independence.

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单项选择题

单项选择题

Questions 17～20 are based on the following passage. You now have 20 seconds to read questions 17～20. What is the passage mainly about 您的浏览器不支持 audio 元素。