题目内容
An ______ boy has to cross the river to go to school every day.
A. 11 years old B. 11-years-old C. 11-year-old D. 11 year old
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题目内容
An ______ boy has to cross the river to go to school every day.
A. 11 years old B. 11-years-old C. 11-year-old D. 11 year old