单项选择题

A．An annoyance call.
B．A crossword puzzle.
C．A broken telephone.
D．A musical instrument.
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单项选择题
A．An unhealthy diet.B．Irregular periods of sleep.C．Sitting too long surfing the Internet.D．Using good monitors.
A．An unhealthy diet.
B．Irregular periods of sleep.
C．Sitting too long surfing the Internet.
D．Using good monitors.
填空题
whatsoever
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