单项选择题

The announcement is made ______.

A．
[A] during the flight

B．
[B] before taking off

C．
[C] after taking off

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单项选择题
People in the plane can ______.
A．
[A] have a good sleep

B．
[B] have some small gifts

C．
[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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