选D
two and a half years
代表2年半,要用复数
our teacher has been teaching in this school for( ) a.two year and a half b.two and a half year c.two years and a half d
our teacher has been teaching in this school for( ) a.two year and a half b.two and a half year c.two years and a half d.two and a half years
英语人气：429 ℃时间：2019-10-09 10:34:36
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