A frog   is born in a small river.When he is young,the river is his home.He doesn't know his parents,but he has hundreds of brothers and sisters.He swims about and plays with them all the time.At that time,he doesn't look like his parents.He has no legs and he has a big tail  .So he looks like a fish. Later,his tail gets shorter and shorter.And he has four legs and a very short tail.He looks like his parents now. Then, he's going to eat a lot of bad insects  . A frog has  _  .
four legs and a very short tail four legs but he has a long tail no legs but he has a long tail no legs and he looks like a fish