单项选择题

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

A．More than 100 students.
B．About 50 students.
C．About 200 students.
D．8 to 10 students.

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填空题

The writer includes the example of watching TV in Paragraph 4 for the purpose of ______.

问答题

understate

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