阅读理解。 A frog (青蛙) 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 (尾巴). So he looks like a fish. Then 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 (害虫). 1. Where is a frog born? A. On a farm B. On the land C. In the river D. In the sea 2. Which of the following is right? A. A baby frog stays at home and knows only his parents. B. A baby frog looks like a bird and he doesn't know his parents. C. A baby frog looks like his parents but he doesn't know them. D. A baby frog looks like a fish and he has a lot of brothers and sisters. 3. Who does a frog play with all the time? A. His parents B. His brothers and sisters C. Fish D. Insects 4. A frog has ______. A. four legs and a very short tail. B. four legs but he has a long tail. C. no legs but he has a long tail. D. no legs and he looks like a fish.