单项选择题

A．On a busy street.
B．in a Hong Kong hotel.
C．At an airport.
D．At a booking office.
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单项选择题
A．involvedB．involvingC．evolvedD．evolving
A．involved
B．involving
C．evolved
D．evolving
单项选择题
A．Listening to quiet music,B．Listening to loud music.C．Studying.D．Talking on the telephone.
A．Listening to quiet music,
B．Listening to loud music.
C．Studying.
D．Talking on the telephone.
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