单项选择题

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

A．She will not answer the phone.
B．She will hang up the phone.
C．She will call her friend.
D．She will ask the man to answer the phone.

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单项选择题

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In the past, aviation industry was the smallest source of greenhouse gases emission and thus did not attract people’s attention.

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