無論是身處學校還是步入社會，大家都嘗試過寫作文吧，根據寫作命題的特點，作文可以分為命題作文和非命題作文。相信寫作文是一個讓許多人都頭痛的問題，下面是小編幫大家整理的英語四級作文：乾旱的.世界(A Thirsty World)，供大家參考借鑑，希望可以幫助到有需要的朋友。
the world is not only hungry, it is also thirsty. this may sound strange, since nearly seventy percent of the earths surface is covered with water. but about ninety percent of this is sea water. man and most of the animals can only drink and use the remaining percent of water--fresh water.
the need for water is increasing day by day. only steps are taken to deal with this problem immediately can we avoid a severe world-wide water shortage later on. one of the first steps is to develop ways to reuse it.
eperiments have already keen carried out in this used witer has been pumped to a water-purifying e, it can be separated from waste matter and treated with chemicals so that it can be used again, just as if it were fresh water from a spring.
