单项选择题

A．One sixth of them are seriously polluted.
B．One third of them are seriously polluted.
C．Half of them are seriously polluted.
D．Most of them are seriously polluted.
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单项选择题
A．They appear every night in TV weather forecasts.B．They were first employed as women news announcers.C．They are the most attractive women in Britain.D．They are the most popular stars in a TV play.
A．They appear every night in TV weather forecasts.
B．They were first employed as women news announcers.
C．They are the most attractive women in Britain.
D．They are the most popular stars in a TV play.
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