单项选择题

Questions 11 to 18 are based on the conversation you have just heard.

A．Stay up all night.
B．Go to bed.
C．Learn to work on computer.
D．Finish the paper.

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What sounds could be imitated by crinkling cellophane

Questions 11 to 18 are based on the conversation you have just heard. 您的浏览器不支持 audio 元素。