单项选择题


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

A．Pick up the ticket.
B．Apologize.
C．Go on her vacation.
D．Fly to Berlin.
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单项选择题
A．Progress in medicine.B．Progress in computers.C．Progress in new materials.D．Progress in helicopters.
A．Progress in medicine.
B．Progress in computers.
C．Progress in new materials.
D．Progress in helicopters.
单项选择题
A．To demonstrate an experiment.B．To explain the grading procedures.C．To inform the students of the safety measures.D．To tell the students how to use the safety equipment.
A．To demonstrate an experiment.
B．To explain the grading procedures.
C．To inform the students of the safety measures.
D．To tell the students how to use the safety equipment.
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