单项选择题

A．normal
B．common
C．unusual
D．quick
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单项选择题
A．flattedB．weakenedC．stolenD．cleaned
A．flatted
B．weakened
C．stolen
D．cleaned
单项选择题
When will the passengers be able to get up again
[A] When an air-hostess says so.
B. When the seat-belt sign goes off.
C. When the captain makes another announcement.
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