翠鸟有林栖和水栖两大类。林栖的一类以昆虫为主食。水栖的一类在水边的树枝或岩坡上做窝，善于捕鱼。它们常停在河溪、湖、海湾等附近，或盘旋在水面上空。只要鱼鳞银光一闪，它们紧挟双翅，尾上头下，全身笔直，直插水中，又细又长的嘴张开，紧紧叼住鱼儿后，就张开翅膀，掉头钻出水面，回到附近高处。先抖掉身上水珠，再把鱼儿在自己腿上狠狠拍打几下，让鱼昏死过去，然后扔向空中，等鱼儿头冲下落下时，张开嘴一口吞下。全部动作干净利落。

      The man is his father. His name is Mike. He is a teacher in No. 3 High School. 62. Dave's mother is next to his father. She is a nurse in Ren'ai Hospital. The girl in red is Betty. She is Dave's sister. She is twelve. She is in Grade 7 in No. 3 High School. Who is that boy in a cap? It's Dave. He looks like his father. Dave and Betty are in the same school, but in different grades. Dave is in Grade 8. Oh, who are the old man and woman on the sofa? They are Dave's grandparents. They are old and they live with their children(孩子) now.
阅读短文内容，完成下列任务。