a one-year-old boy为什么不是an

是a one-year-old boy还是an one-year-old boy a one-year-old boy为什么不是an He is () one-year-old boy.A anB aC the - Though Mike is ( )boy,he can say many words.--How cleverA.an-one-year-old B.a one-year-old C.an one-year old D.a one-year old Tim is ___ boy.He can say a few words.A.an one-year-old B.a one-year-old C.an one-year oldD.a one-year old Tim is one-year-old boy.A.a.B.an.C.the.D./ one-year-old boy 前面是填a还是an呢? a thirteen-year-old boy的中文翻译 a thirteen-year-old boy=什么? Tommy is an one -year -old boy.哪错了 _____(a/an)1-year-old boy _____(a/an)8-year-old boy _____(a/an)11-year-old boy_____(a/an)13-year-old boy a twenty year old boy对还是a twenty years old boy对哪个等于 a twenty-year-old boy? a five-year-old boy还是a five-year old boy a four-year-old boy可以说成a four-year old boy a 11-year-old boy还是an 11-year-old boy lf i were a15 year-old boy 句型转换为_______ ______I were a boy ______ 15. My little brother is ____.A.a six-years old boy B.a six-year-old boy C.a six-years-old boyD.a six-year old boy Tim is ____boy.He can say a few words.A.an one-year-old B.a one-year-old C.an one-year oldD.a one-year old