单项选择题

Questions 23 to 25 are based on the conversation you have just heard.

A．Production manager.
B．Lab manager.
C．Sales manager.
D．Quality control manager.
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单项选择题
A．To know whether they read the book or whether they understand the book.B．As a common home assignment.C．To help improve their writing.D．To monitor their research.
A．To know whether they read the book or whether they understand the book.
B．As a common home assignment.
C．To help improve their writing.
D．To monitor their research.
单项选择题
A．Not comfortable.B．Rather crowded and slow.C．Interval is long.D．Cannot reach suburban areas.
A．Not comfortable.
B．Rather crowded and slow.
C．Interval is long.
D．Cannot reach suburban areas.
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