阅读短文，从方框中选择恰当的词语并用其适当形式填空 (每个词语限用一次).

easy, part, pollute, and, earth, future, environment, care, little, but, plant, few

We live on the . It is our home. We must take of it. Life today is but there are more problems. One of the biggest problems is I It's not good for the living things in the world. We should protect the But to our pleasure(高兴）,people know this 7 start to take action. People begin to  more trees an make pollution. As for us, we each should play a in saving the earth. I'm sure we will have a beautiful world in the .