单项选择题

A．For high speed transportation.
B．For extremely high altitude flights.
C．For overseas passenger transportation.
D．For urgent mission to places inaccessible to other kinds of craft.
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单项选择题
A．Not to drive in a heavy rain.B．To do it in an organized way.C．Not to get too close to a storm.D．To spend more time on it in summer.
A．Not to drive in a heavy rain.
B．To do it in an organized way.
C．Not to get too close to a storm.
D．To spend more time on it in summer.
单项选择题
A．Look into another passenger’s eyes.B．Signal you are not a threat to anyone.C．Keep a distance from other passengers.D．Avoid eye contact with other passengers.
A．Look into another passenger’s eyes.
B．Signal you are not a threat to anyone.
C．Keep a distance from other passengers.
D．Avoid eye contact with other passengers.
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