【正文】
formation development Conclude the main idea of each paragraph. 1) A widely ______ about the _____ of the universe. 2) The formation of the ______. 3) The __________ of water for life. 4) The development of ______ and _______ on the earth. 5) The arrival of _______ and their _____ on the earth. theory origin earth importance plants animalshumans influence / effect Scanning 1. What is the original earth’s atmosphere made up of? 2. What is the fundamental to the development of life, and why? 3. Which kind of lifebeing first appeared on the earth, plants or animals? Intensive reading