综合填空.根据短文意思,选择括号内单词,用适当形式填空
（help,animal,do,dog,friend,with,house,some,people,be)
短文：Animals are our_______.We can find different kinds of _________on the earth. _________animals are living in big forests.And
some animals are living _________man.Ainmals are very important to man.For example,________
can train the elephants to_________some heavy work.And they can also train the dogs to look after the_________.A watch dog_________very elever.It can_________people in danger.Chidren like _________very much.