单项选择题

Questions 19 to 22 are based on the conversation you have just heard.

A．The whole summer.
B．Twenty-three hours.
C．Twelve days.
D．Three weeks.

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单项选择题

单项选择题

Questions 19 to 22 are based on the conversation you have just heard. 您的浏览器不支持 audio 元素。