a one-year-old son为什么冠词是a不是an ?

a one-year-old son为什么冠词是a不是an ? a one-year-old boy为什么不是an 是a eight-year-old 还是an eight-year-old 冠词的选用Once a year,a race is held for old cars.这里为什么不是the race one－year-old前面用an还是a 英语翻译A young couple had a three-year-old son.One day,whenthe one-year-old boy 前面是填a还是an呢? an 8-year-old 为什么加an而不是a,是不是8是元音开头的? Mr.Green has ___one-year-old son,doesn't he?A:a B:an C:a D:a one 前的冠词是a 还是an? Mr Wang is an man.A.28-year-old B.80-year-old 为什么 Tim is ____boy.He can say a few words.A.an one-year-old B.a