单项选择题

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

A．To represent his firm.
B．To have an interview.
C．To pay a social call.
D．To service a computer.

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业余爱好的意义。2．选择业余爱好的注意事项。3．业余爱好的形式。Hobbies

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