I was born in a small river. When I  young, the river was my home. I didn't know my  (parent),   I had  (hundred) of brothers and sisters. I swam(游)and played all day with  . At that time, I didn't look like my parents. I had no legs, but I had a long tail(尾巴). So I  (look) like a fish.

    Then  (I) tail got shorter than before. And now I know l  four legs and a very short tail. I know I'm going to  (like) my parents. Then I'm going to eat lots of bad  (insect). Do you know what I am?