单项选择题

A．A year ago.
B．A decade ago.
C．Three years ago.
D．Five years ago.
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单项选择题
A．He’s a boat builder.B．He smokes a pipe.C．He paints in watercolours.D．He fixes pipes.
A．He’s a boat builder.
B．He smokes a pipe.
C．He paints in watercolours.
D．He fixes pipes.
单项选择题
A．Because they have had little exposure to high level of sounds.B．Because they suffer from hearing loss.C．Because they don’t know how to operate stereo systems.D．Because they are not qualified engineers.
A．Because they have had little exposure to high level of sounds.
B．Because they suffer from hearing loss.
C．Because they don’t know how to operate stereo systems.
D．Because they are not qualified engineers.
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