Are they dumplings?这句话对吗

Are they dumplings?这句话对吗 They are ice-cream.这句话对吗? They are cheap.这句话对吗? they are alomst children这句话对吗? Are they calendars?这句话对吗? they are making dumplings my favourite food are dumplings.这句话对吗?是不是food应该用is修饰还是名次服输前用 They are making dumplings (翻译) They are both tall man.这句话对吗 Are they the children's books?这句话对吗? they are in that box.这句话这样说对吗. They are to have for lunch.这句话对吗?为什么?