综合填空 根据短文大意选择方框内的单词,并用其正确的形式填入空白处(每空填一词)，使补全后的短文意思通顺，语法正确,结构完整。

In the past, people killed animals for their meat and skins .Now some        of animals are becoming fewer and fewer. And some animals are in          of disappearing completely. Some people destroy the environment where animals live.  For example, in the past, pandas had a quiet life and     food. However, the bamboo forests are now disappearing rapidly because humans destroy them. Now pandas can’t find enough bamboo to eat. Humans have come to realize that animals are        to us. They are our friends on this planet. We should do our best to        them. Then the world will be much better.