a America 还是 an America?是用A还是AN不是看音标是不是元音么?是只看音标就行么?那AMERICA的音标的第一个是”饿”,那它不是元音,为什么要用AN呢?请说明一下在单词前面用A或者是AN到底看什么?

I am an America(n) boy.用America还是American? from-----America.填什么Americe 前面填A还是AN或者不用填 Betty is from _____she is an ________girl A:America;American B:American;America C:America;America选择填空 FEDERAL RESEVE NOTE THE UNITED STATES OF AMERICA请帮忙翻译,细致一些.FEDERAL RESEVE NOTE THE UNITED STATES OF AMERICATHE UNITEDSTATES OF AMER FEDERAL RESERVE BANK NOTES CERIES GOLD CERTIFCATESYPHEN ONE HUNDRED TICKET A HUNDRED MILLION DOLLAR Is lucy ----?A an English B America C American D an America a America 还是 an America?是用A还是AN不是看音标是不是元音么?是只看音标就行么?那AMERICA的音标的第一个是”饿”,那它不是元音,为什么要用AN呢?请说明一下在单词前面用A或者是AN到底看什么? She is an A_____ girl.是填America 还是American 英语翻译Potatoes were first grown in the Andes in South America.In 1586,they were taken to Europe by explorers(探险家).In 1719,they were taken to North America.Before 1719,nobody in North America had ever seen or eaten a potato.Today each Amer Jime is___,but David is an___ A:English;American B:an English;America C:English;AmericaD:an English;America The boy in a red is_______A.English B.An English C.an America D.China I come from ____ .I am an ____.应该选England；English还是America；American Is Andy English?这句话对吗?还是：Is Andy America?或者：Is Andy an English? People say the modern car was made in America.改为同义句 （ ）（ ） the modern car was made in Amer a还是an uniform 用a还是an 要用a还是an? 是a还是an He is an------(America) boy.