单项选择题

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

A．The class thought the demonstration was too complex.
B．Too many students showed up.
C．The professor didn’t show up.
D．The professor cancelled it.

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It is necessary for a newcomer to ______ of the city since some local people also use maps as a guide.

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Mark was a student at Peking University from 1996～2000, during ______ (在这段时间里，他工作努力并很快当选为学生会主席).

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