建筑用的红砖和青砖，其颜色是由其中含有的不同价态的铁氧化物所致．我国古代砖瓦建筑能够保持到现在的，几乎无一例外的是由青砖建成．有人提出以下可能的原因：

①青砖中含的是FeO；

②青砖中含的是Fe₃O₄；

③Fe₂O₃遇长期酸雨侵蚀会风化溶解使砖瓦强度降低；

④Fe₃O₄性质稳定；⑤FeO性质稳定．你认为有道理的是（　　）

    Hello, my name is Jack. I am a ____in No.1 Middle School. In my free time(空余时间), I like ____sports .I like playing tennis and basketball.

    Look ____ my bedroom. I have a tennis racket.____ is on the table. I have two basketballs. They are ____ the bed. Playing sports is very ____, so I like it very much. I also like eating. Among(在...中间)fruits, I like bananas ____. But I ____ like
vegetables. I like French fries very much. So I am very fat. The doctor asks me to eat more ____ food and do more ____.

测交是指（　　）