聽錄音，根據(jù)短文內(nèi)容，補全所缺的單詞或短語。
    Look at this picture.It's the Earth.The green and brown parts are （1）______ and land.The blue parts are oceans.The Earth was very clean and beautiful in the （2）______，but now some parts are dirty.The Earth gets（3）______ .Now people work together to keep the Earth clean and healthy.They （4）______ rubbish.They recycle glass and paper.They bring their own（5）______ and stop using plastic bags.People try to make the Earth a better place.