III. Listen, complete and retell. 

I’m Lily. I am reading a book these days. Its name is World Records. The book covers many kinds of animals, plants, buildings and other topics. From the book I know a lot of things. The heaviest animal is the blue whale. The biggest animal on land is the elephant. The deepest salt lake is the Caspian Sea. The longest river is the Nile. The largest desert is the Sahara.