单项选择题

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

A．Professor and student.
B．Mother and son.
C．Husband and wife.
D．Classmates.
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填空题
It is commented by the author that the passages selected in the book is a ______.
单项选择题
What can we learn about Cisco from the passage
A．It will keep a record of the orders from sales teams.
B．It cut ＄1 billion cost by solely relying on its own technologies.
C．Unlike other technology companies, its financial reports are encouraging.
D．Only employees can use the video-conferencing to pass information.
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