American与 Americans都是美国人,为什么答案却用Americans?

American与 Americans都是美国人,为什么答案却用Americans? We are _______.They are________.A、 Chinese American B、Japanese Chinese C、Americans Chinese D、American Japanese 我感觉B、C都可以,为什么答案是C? They are ___ and the others are ____.A.English;America B.English;American C.Englishman;Americans D.Englishmen;America为什么我感觉都不对呢 what do you know about Native Americans and American Cowboys asian americans african amerians american indians分别是什 we are American还是we are Americans?如题 Americans speak______,you know A English B American American Spanish 和Spanish Americans 有什么不同? for many Americans shopping is a profession.为什么用Americans,不用American We are ------- but they are--------.a.American Japanese b.America Japanesec.American Japan c.Americans Janpan American（美国人）是可数n吗?应该是two American 还是two Americans? 请问：American有复数吗?American有复数吗?如we are American.还是we are Americans. These girls are _____ (American) .这里填Americans 可以么?还是American American什么时候可以用复数形式? Hello!Are you_____?No.We are_____.A.Chinese,Americans B.Chinese,Japaneses C.Japaneses,American.D.Americans ,Chinas 有哪些国家人的复数加s或es,如American(Americans) Cats are the most popular pets among Americans.最后的American,为什么加s? They come from US.They are___.A.American B.America C.Americans D.Americas Lily and Lucy are {美国人}填American 还是Americans,为什么答案加S,急