He is two—year—olds对吗?

He is two—year—olds对吗? 英语翻译a group of 7-year-olds are going to a park with a group of 11-year-olds.if the average age of the two groups together is 9.4 years.how many of each age group are there? may is six-year-olds这样说对吗? Declan is like most other 15-year-olds. a 15-year-old b 15-years-old c15-year-olds d15 ya 15-year-old b 15-years-old c15-year-olds d15 years old he is 40years old and he is 25 years older than his son.he has a boy选哪个 fifteen-year-olds是什么意思? seven-year-olds Twelve-Year-Olds翻译 This is a_boy.He can't look after himself A,four-years-old.B.four-years-olds,C,four- year-old为什么 [ ] are not be allowed to drive .Athere - year-olds Bthere years olds哪个对,主要是理由? 16岁的男孩们 英语怎么说sixteen-year-olds boy和sixteen-year-old boys哪个对?还有sixteen-year-olds对么？ my new friend is a ( )boy.A soxteen-years-old Bsoxteen-years-olds Csixteen-year-oldmy new friend is a ( )boy.A soxteen-years-old Bsoxteen-years-olds Csixteen-year-old Dsixteen-year-olds Ten-year-olds should not be allowed to go out at night.我对ten-year-olds 这种说法不敢肯定,是对还是错 three-year-olds汉语意思 year olds还是years old? 初三英语变成形容词时要不要加s例1Sixteen-year-olds shouldn't be allowed to work at night.例2He is a six-year-old boy.到底什么时候要加啊? 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 sixteen year olds 还是sixteen year old?