先通读下面的短文，然后根据短文内容和所给首字母，在空格内填入一个适当的词，使短文

问题：

先通读下面的短文，然后根据短文内容和所给首字母，在空格内填入一个适当的词，使短文意思完整。

     Wild animals are important to us. They live t     1    with us on the earth. If there are no animals on

the earth, we will not live on, e    2    . So we should take good care of them to help the earth live a

h    3   life.

     But some people still don't r    4    the importance of protecting them. They kill wild animals for food

and something e    5    . Every day many wild animals are being killed. So far, lots of wild animals have

died out. If this goes on, there will be no animals l    6    on the earth.

     L    7    , many people have begun to know the importance of protecting wild animals. They ask

others to stop killing wild animals. Now many countries have made some l    8      to protect wild animals

and to stop people from killing them.

     Protecting wild animals is the d    9    of each of us. We should do our best to protect them because

protecting them is protecting o   10    too.