用合适词的正确形式填空。每空一词。
Animals are our 1 . We can find different kinds of 2 in the world. 3 animals only eat grass,
for example, elephants and cows. And some animals only eat 4 , for example, tigers and lions. Animals
can 5 many things for people. For example, elephants can help people 6 some heavy(重) work.
Children like 7 very much, so they often play 8 dogs. They think dogs 9 very clever. Boys and
girls, what animas 10 you like?