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Dolphins(海豚) are clever and lovely animals. Many people like them. Let me tell you some interesting things a    1    them.
Like(像) people, each dolphin has a “name”. I    2    is a special whistle.(哨声). And dolphins t    3    to each other about lots of things, like their age, their hobbies or finding food. But understanding(理解) them is not e    4    for people.
Like people, dolphins like to get t    5    and play games. They also have a lot of f    6    when they play games.
Dolphins and people b    7    make plans when they want something. In the sea of Brazil ( 巴西), dolphins use an interesting way to g    8    the food. When fish are n    9    a boat, dolphins signal(发信号) to the fisherman(渔民). And the fishermen catch a lot of fish. Why do dophins h    10    the fisherman? haha, they can get some of the fish.