单项选择题

A．involved
B．involving
C．evolved
D．evolving
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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.
单项选择题
A．have readB．are readingC．readD．had read
A．have read
B．are reading
C．read
D．had read
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