根据语法和文章的上下文意思填入所缺单词。 Animals are {#blank#}1{#/blank#} (people) friends. But many wild animals are {#blank#}2{#/blank#}(face) the danger of{#blank#}3{#/blank#}(die) out. There're many reasons. First, their living environment change a lot because of the {#blank#}4{#/blank#}(develop) of many cities. Also, {#blank#}5{#/blank#}(pollute) becomes worse and this make wild animals lose {#blank#}6{#/blank#}homes. Second, some people are killing animals {#blank#}7{#/blank#}getting their fur, skin, teeth and meat.
People should do something to help protect {#blank#}8{#/blank#}(endanger) wild animals. For example, people can build some nature reserves to save wild animals' homes. Animals can live {#blank#}9{#/blank#}(free) there. Besides, people are not allowed {#blank#}10{#/blank#}kill wild animals. If we start protecting our animal friends, our world will become much better.