Read the text. Choose the rigt words and write them on the lines.
'Hippo' __is__ a short word for 'hippopotamus'. The word 'hippopotamus' means 'river horse'. Hippos are (1)___ river horses because they live (2)____ rivers and lakes and eat grass. Hippos never eat meat but they are very strong and brave animals. They aren't afraid (3)___ crocodiles or boats. When they (4)___ angry, they open their mouths to show their big teeth. The eyes and nose (5)___ very high on a hippo's head. This means that a hippo can swim with only the top of its head out of the water. It can still see, and take in the through its nose. But hippos also like going under the water. They are very good (6)___ walking on the bottom of a lake. They close their noses and ears and can stay under the water (7)___ five minutes!
(8)____ night, hippos leave the water and spend five (9)___ six hours eating grass. But early the next morning, they (10)____ to go back into the water before the hot sun comes up in the sky again.
