单项选择题

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

A．The technical manager.
B．The sales manager.
C．The laboratory manager.
D．The operation manager.
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单项选择题
A．At 9:30.B．At 10:30.C．At 10:00.D．At 11:00.
A．At 9:30.
B．At 10:30.
C．At 10:00.
D．At 11:00.
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.
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