Main Body├ ■(▭(Paragraph1": " Awidelyacceptedtheoryabouttheoriginoftheuniverse"." )@■(Paragraph2": " Theformationoftheearth"." @Paragraph3": " Theimportanceofwaterforlife"." @Paragraph4":" Thedevelopmentofplantsandanimalsontheearth"." )@■(Paragraph5": " Thearrivalofhumanbeingsandtheirinfluence"/" effect"/" impacton@theearth"." ))┤

　　Task 2

　　8,10,3,5,9,7,2,4,6,1,12,11

　　Task 3

　　1.Because the water remained on the earth.

　　2.Because dinosaurs died out long before human beings developed on the earth.

　　3.Human beings cause global warming.

　　课堂提升

　　Summary

　　dust;exploded;in time;carbon dioxide;water;The small plants;shell fish and all sorts of fish;land animals;amphibians;forests;reptiles;dinosaurs;mammals;human beings