单项选择题

A．well-known
B．common
C．valuable
D．serious
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单项选择题
What are they talking about
A． an experience
B． a lot of questions
C． the weather
单项选择题
What does the woman tell the man to do
[A] Improve his grades.
B. Write to the director of the flight program.
C. Use his professors at references.
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