用所给的适当形式填空 1. If you're tired, why not stop____ (have)a rest? 2. ____ (recycle) books and paper is a good way (protect) the environment. 3. I don't____(agree) with you.I think zoos are terrible places for animals. 4. He is against (put) animals in cages. 5. People should stop____(ride)in cars and start (ride)bikes to help save the planet.