七年级英语单词中前面需要加an的单词有哪些,50个以上···答:eye, hour, umbrella, elephant, apple, angle, American, island, an old man, orange, answer, idea, actor/ actress(男/女演员), engineer(工程师), inventor(发明家), airplain, industry(工厂), agreement(协议), artical, office, event, understanding, age, opinion,enemy(敌人),...