单项选择题

The announcement is made ______.

A．during the flight
B．before taking off
C．after taking off
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单项选择题
People in the plane can ______.
A．have a good sleep
B．have some small gifts
C．buy some duty-free things
单项选择题
We learn from the text that ______.
A．the passengers will have a morning flight
B．they will have meals during the flight
C．the plane is going to fly across a mountain
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