单项选择题

Questions 19 to 22 are based on the conversation you have just heard.

A) She is the director of the group. C) She is playing the violin.
B) She is playing the piano. D) She is playing the bass.
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单项选择题
A．She must look after the passengers and do routine work.B．She must fulfill special duties under all situations.C．She must remain calm in case of an emergency.D．She must keep the plane in normal order.
A．She must look after the passengers and do routine work.
B．She must fulfill special duties under all situations.
C．She must remain calm in case of an emergency.
D．She must keep the plane in normal order.
填空题
The system will be cancelled when you use the key to open the back door.
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