(
课件网) LESSON 1 TO CLONE OR NOT TO CLONE UNIT 9 HUMAN BIOLOGY LEARNING OBJECTIVES To read and talk about cloning; To notice and discuss how a writer organises writing; To analyse a writer's intentions and opinions; To compare personal opinions with the ideas of others; To read for specific information to understand words in context; To recall and summarise information; To learn and practise using verbs in the perfect tense. KEY POINTS AND DIFFICULT POINTS To answer the comprehension questions; To understand and discuss cloning; To analyse a writer's intentions and opinions; To learn words and expressions in context; To struggle with complicated sentence structures; To think critically and express opinions freely. LEADING IN What do you know about the perfect He had been mentioning your name to me. As soon as we got to the station, the train had left. The experiment has been done successfully. We have been seeing quite a lot of each other recently. By the end of last month, we had reviewed four books. He has been saying that for years. George has met that gentleman on several occasions. I had been looking for it for days before I found it. FOCUS ON LANGUAGE: THE PERFECT Identify the tense of the sentences and write the number in the correct columns. 1. Natural cloning has been going on for generations. 2. Gardeners have been using a form of cloning when they take a cutting from a plant ... 3. For years, there had been attempts to clone animals. 4. Cloning primates has proved to be "much harder" than cloning other species. 5. Dr. Sun Qiang said they had been wholly devoted to the research ... 6. Dr. Sun Qiang said they had been taking care of more than 1,000 monkeys 24 hours a day, 7 days a week ... FOCUS ON LANGUAGE: THE PERFECT Identify the tense of the sentences and write the number in the correct columns. Present perfect Present perfect continuous Past perfect Past perfect continuous 4 1, 2 3, 5 6 have / has done have / has been doing had done had been doing FOCUS ON LANGUAGE: THE PERFECT Complete the passage with the proper form of the words in brackets. On Thursday, the Institute of Neuroscience announced it 1. _____ (clone) two monkeys using non-reproductive cells. It is reported that researchers all around the world 2. _____ (conduct) tests on animals, such as mice and dogs, for many years but couldn’t find a way to clone monkeys. The news of the successful cloning 3. had cloned have been conducting FOCUS ON LANGUAGE: THE PERFECT Complete the passage with the proper form of the words in brackets. _____ (attract) attention from around the world. However, cloning primates 4. _____ (also raise) ethical concerns. For example, some people 5. _____ (discuss) issues concerning how clones will be treated in society. has attracted have also raised have been discussing GRAMMAR 完成时 一、现在完成时 1. 构成：have/has + 过去分词 2. 用法： （1）过去的动作或状态持续到现在已经完成，对现在造成的影 ... ...
