A．Waving the fingers up and down.B．Holding your hand up-找考题网

单项选择题

A．Waving the fingers up and down.
B．Holding your hand up with the palm facing forward but no movement.
C．Raising your hand and waving it front to back.
D．Raising your hand and waving it from side to side.

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单项选择题

A．Operate metal detectors.B．Require each passenger to show photo identification.C．Make a body search by hand.D．Operate X-ray machines to screen baggage.

A．Operate metal detectors.
B．Require each passenger to show photo identification.
C．Make a body search by hand.
D．Operate X-ray machines to screen baggage.

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