单项选择题

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

A．Almost three years.
B．Between three and four years.
C．17 years.
D．5 years.

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单项选择题

填空题

People may hear______700 times during Christmastime.

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