单项选择题

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

A．Two students.
B．A student and a parent.
C．A teacher and a student.
D．A student and a supervisor.

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单项选择题

单项选择题

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