单项选择题

A．About the cost of living.
B．About their safety.
C．About pollution.
D．About traffic jams.
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单项选择题
A．She is the director of the group.B．She is playing the piano.C．She is playing the violin.D．She is playing the bass.
A．She is the director of the group.
B．She is playing the piano.
C．She is playing the violin.
D．She is playing the bass.
单项选择题
A．Horses and donkeys.B．Trains, ships, and planes.C．Cars and E-mails.D．Satellites.
A．Horses and donkeys.
B．Trains, ships, and planes.
C．Cars and E-mails.
D．Satellites.
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