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①shouldbeallowedtodothehomeworkthemselves.A.Sixteen-year-oldB.SixteenyearsoldC.Sixteen-year-oldsD.Sixteen-years-old

题目详情

①_____ should be allowed to do the homework themselves.

A. Sixteen-year-old  B. Sixteen years old  C. Sixteen-year-olds   D. Sixteen-years-old

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答案和解析

 ①C