(1). The hippopotamus is a __________ animal. ____________
(2). During the day, it sleeps ________ a river or a __________. ____________
(3). It is a __________. ____________
(4). Its __________ is seven meters long, and it eats only __________. ____________
(5). It can close its nose and __________ under water for ten minutes. ____________
(6). It can stay with its body under the water and only its ears, eyes, and nose ______ the water. ____________
(7). Then it can __________ the air. ____________
(8). It is a mammal, but it __________ a lot of time in the water. ____________
(9). Its eyes, ears, and nose are __________ up on its head. ____________