阅读下面短文, 按照句子结构的语法性和上下文连贯的要求, 在空白处填入一个适当的词或使用括号中词语的正确形式填空。

There are many ways to save the environment if you would like. In this passage, you can find some _____(way).

Plant more trees. Choose _____ right ground near your house or workplace. Unless there's any rule stopping you growing trees in that area, _____(go)ahead and grow trees. Plant a tree every month and encourage your friends and classmates _____(join)you. Have more and more trees planted and there will come a day when you have green land, thanks _____ your hard work.

Walk more and drive _____(little). Choose to walk rather than drive your car. Walk or ride a bicycle to work if it's not very far. Not only cycling but _____ (walk)is good exercise. And each time you avoid using your car, you're doing something _____(help)to cut down air pollution. You are saving fuel, saving money and keeping fit as well.

Save water. Water is very important for living things. It's we who use and pollute it. The simplest way to save water is turning _____ water taps after using. When you visit a beach, make sure that you don't throw waste around. Do not pollute rivers by dropping garbage or other waste. Water is so precious ______ we can't waste or pollute it.

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