标签：话题作文 话题 英语四级作文
字数：1000字
提要：The Earth Is Our Only Home英语作文网为您收集 作文网 The Earth Is Our Only Home Some people imagine to leave this fearful world, only to come down to earth. Scientists tell us that of all the stars known in the vast universe, the earth is the only planet on which human beings can survive. But now we are facing the risky problems concerning our existence on earth. Worldwide environmental deteriorati..