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完形填空。 IntheUSA,childrenstartschoolwhentheyarefiveyear...
问题详情:完形填空。 IntheUSA,childrenstartschoolwhentheyarefiveyearsold.Insomestatestheymuststayinschool 1 theyaresixteen.Butmoststudentsareseventeenoreighteenyearsoldwhenthey 2 ,secondaryschools.T...