单项选择题

A．He was a Wall Street financier.
B．He was a congressman.
C．He did petroleum business.
D．He began his career in the oil industry.
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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.
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.
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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