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is not (缩写) third(基数词) policeman (复述,数形式) brush、knife、tomato、box(复数形式)

题目详情
is not (缩写) third(基数词) policeman (复述,数形式) brush、knife、tomato、box(复数形式)
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答案和解析
isn't
third
policemen
brushes
knifes
tomatoes
boxes