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Thisisa___boy.Hecan'tlookafterhimself.A.four-years-oldBfour-years-oldsC,four-year-oldDfouryearold一直分不清有连字符和没有连字符的区别
题目内容：
This is a ___boy.He can't look after himself.
A.four-years-old B four-years-olds C,four-year-old D four year old 一直分不清有连字符和没有连字符的区别优质解答
选 C,four-year-old =four years old
A.four-years-old B four-years-olds C,four-year-old D four year old 一直分不清有连字符和没有连字符的区别
优质解答
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