one-year-old boy 前面是填a还是an呢?

one-year-old boy 前面是填a还是an呢? 是a one-year-old boy还是an one-year-old boy a one-year-old boy为什么不是an Tommy is an one -year -old boy.哪错了 He is () one-year-old boy.A anB aC the one－year-old前面用an还是a 1岁时,是 one years old 还是 one year old? - 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 a fourteen years old boy 在句子中对吗是a fourteen -year- old boy 请问是an eleven-year-old boy还是an eleven-year old three-year-old boy 这样的前面用a还是an?两种我都看过.. 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./ 请问,“一岁”翻译成英语是one year old还是one years old? 一个10岁的男孩是“a ten-year-old boy还是a ten years old boy? 请问:是a four years old boy?还是a four year old boy?正确要肯定的 a thirteen-year-old boy的中文翻译 a thirteen-year-old boy=什么?