Unit 9 Check you progress+workbook 课件-2022-2023学年高中英语北师大版（2019必修第三册

Li Zhen and her friends are designing a poster for their school's monthly activity "Human and Us". Complete her report about the development of cloning using the correct form of the words and phrases below. forever barrier in comparison clue crucial accurate identical twins ethical abuse blessing Cloning occurs when an egg splits and creates (1) ______________. The first animal to be successfully cloned by scientists was a sheep called Dolly. Despite the initial success, she suffered from an illness and died at the age of six. Since then, other animals such as goats and camels have been cloned but have also experienced similar health problems. Scientists are not sure if this problem will continue to happen (2) __________ . identical twins forever forever barrier in comparison clue crucial accurate identical twins ethical abuse blessing (3) __________with other species, attempts to clone monkeys have been far more complicated and took Chinese scientists many years. The reason why they wanted to break this technical (4) __________ was that monkey cloning might offer (5) _________ as to how to cure illness and disease. As the technology improves and becomes more (6) _________ there would be even greater benefits. In comparison barrier clues accurate forever barrier in comparison clue crucial accurate identical twins ethical abuse blessing While some people see cloning as (7) ________for medical and scientific development, others have (8) _________ concerns about how it could be used. They worry that this technology will lead to cloning of other species. There is a risk that this could be (9) __________ by some companies or people. Whether it is a (10)__________or a curse for humanity remains to be seen and depends on how we choose to use it. crucial ethical abused blessing Complete Chen Yang's outline of the introduction to the human brain using the correct form of the words and phrases below. contain electrical impulse organ locate nerve be respons