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Questions 22 to 25 are based on the passage you have just heard.

A．Free of charge.
B．Either by check or by cash.
C．Either by cash or by credit card.
D．Either by check or by credit card.

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It seems that the author disagrees to explain ______.

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Questions 22 to 25 are based on the passage you have just heard. 您的浏览器不支持 audio 元素。