单项选择题

Passage One
Questions 26 to 28 are based on the passage you have just heard.

A．To write a business letter.
B．To provide proof of the deal.
C．To find out the mistakes of a letter.
D．To finish reading the letter quickly.

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单项选择题

单项选择题

Passage One Questions 26 to 28 are based on the passage you have just heard. 您的浏览器不支持 audio 元素。