Unit6第六课时（sectionB 2a-2d)课件2022-2023学年人教版英语九年级全册

Section B(3a—3c) UNIT 6 When was it invented ? 1 Self Check 1. Complete the passage with the correct forms of the words in the box. invent, doubt, mention, nearly, website, all of sudden It is often difficult to decide on the inventor of certain inventions. This is because sometimes a few people may ______ things which are _______ the same. It’s hard to tell who came up with the idea first. Some inventions can also lead to other inventions _____________. So some people _____ whether the inventor came up with the idea himself or herself. They think that the invent nearly all of a sudden doubt inventor used someone else’s idea to create his or her invention. That is why books or _______ usually _______ more than one inventor when giving information about inventions. websites mention 2. Rewrite these sentences using the passive voice. 1. Someone stole my watch. _________________________________ 2. They used five eggs to make this big cake. ____________________________________ 3. When did they invent the personal computer? __________________________________ My watch was stolen (by someone). Five eggs were used to make this big cake. When was the personal computer invented? 4. They asked us not to run in the hallway. __________________________________________ 5. Someone took the video back to the store. __________________________________________ We were asked not to run in the hallway (by them). The video was taken back to the store (by someone). 3. Find out information about an invention you would like to know more about and write sentences below. Invention: ____________________________________ When: ____________________________________ Who: ____________________________________ Purpose: ____________________________________ umbrella with a light in 2013 Li Meng seeing in the rain in the dark 3a Think of something that you do not like to do. Then think of an invention that could help you. Make notes. Problem: _____