Unit4readingI.Read the text and match the main idea of each paragraph.Paragraph 1: a.The importance of water for life Paragraph 2: b.The development of plants and animals on the earth Paragraph 3: c.The formation of the earth Paragraph 4: d.A widely accepted theory about the formation of the universe Paragraph 5: e.The arrival of humans and their impact on the earth II.Fill in the blacks. The development of the earth Time The earth A cloud of dust A solid globe Exploded with fire and rock Produce C/N water vapor, etc. Water began to appearIII.Can you put the order of development of life into a time line?1. Insects and amphibians appeared. 2. Dinosaurs appeared.3. The earth became a solid ball. 4.Small plants grew on the water.5. Reptiles appeared. 6. Plants began to grow on dry land.7. The earth was a cloud of dust 8. Water appeared on the earth9. Shellfish and other fish appeared. 10. The universe began with a “Big Bang”.11. Clever animals with hands and feet appeared 12. Mammals appeared.IV.What’s the writing style of the text?A. Narrative 记叙文B. Explanation 说明文C. Essay 散文v. Phrases and Useful Expressions1. circle around 2. according to… 3. a widely accepted theory 4. in all directions 5. in time 6. cool down 7. be fundamental to… 8. a chain action 9. …make it possible for…to do…10. give birth to… 11. prevent… from 12. millions of years to comeVI.Understanding.a.Match the phrases underlined with their correct meaning.1.They were in time to produce carbon, nitrogen, water vapour and other gases.2.They multiplied and filled the oceans and seas with oxygen.3.Carbon dioxide prevents heat from escaping from the earth.4.It was not immediately obvious that water was to be fundame...
