题目

语法填空 In the past few years, the number of wild animals has decreased due to human activities such as destroying the natural habitat of wild animals. If nothing （ do）, man will be punished by nature. （ lucky）, people begin to take actions. They （build） some nature reserves now so that animals can live in peace. If everyone has the sense of protecting wildlife, it is certain an atmosphere of wildlife protection will come into being. 答案：【1】is done【2】Luckily【3】are building【4】that

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