a/an ( ) ungly boy

ungly duckling has grown into a swan ----American boy (a/an/the) Tom is_____Amercan boy A.an B.a 是 a honest boy 还是 an honest boy 是a upset boy 还是 an upset boy an ugly boy 正确,还是a ugly boy 正确 Tom is _(a/an)European boy I an a boy.改为一般疑问句 _____American boy是填a还是an Active boy前面加a还是an _____(a/an)1-year-old boy _____(a/an)8-year-old boy _____(a/ He is () eight boy.A:an B:a