（a/an）18-year-old 18前面是an还是a

Jane is（）high school studentA.a 18-year-old B.a 18-years-old C.an 18-years-old D.an 18-year-old （a/an）18-year-old 18前面是an还是a 一个18岁男孩 用英语怎么说（要用连字符）请问是 an eighteen-year-old boy 还是 a eighteen-year-old 为什么? Mrs Green is a doctor of______and her daughter Ann is_____university sthdentA.50 years old;an 18-year-old B.50-year-old;an 18 years old C.50 years old;a 18-years-old D.50-years an 18-year-old high school student 为什么是an不是a a eleven-year-old还是an eleven-year-old 是a eight-year-old 还是an eight-year-old 18—year—old前面用a还是用an 1、be careful ____ _____ ____ (not play)with matches.2、Simon is an _____ boy .it means he is ____ A.18 years old;18 years old B .18-year-old;18 years old C.18 years old;18-year -old D.18-year-old;18-year-old _____(a/an)1-year-old boy _____(a/an)8-year-old boy _____(a/an)11-year-old boy_____(a/an)13-year-old boy an 18 years old,an 18-year-old有什么区别 It is an honor for an__ to go to Harvard University.A,18 years old B,18-year's old C,18-year The professional tennis player is______.A.an eighteen year old girl B.an eighteen-year-old girl C.an eighteen years old girlD.an eighteen-year-old girl an onehundred-year-old man用a还是an 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 Lily,_______girl,is very popular in our class.A、a 8-year-old B、a 8 year old C、 an 8-year-old D、an 8-years-old he is ____boy 1.a eight-year-old 2.an eight-year-old 3.an eight-years-old 4.a eight year old She is an ______ woman A 60A 60-year-old B 70-year-old C80-year-old D88-year-old