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1、Unit 9When was it invented ?Section A 1a-2c1876187618851885102310231927192719711971197619762000200018761876188518851023102319271927197119711976197620002000calculator188519271976187619711bListen and match the inventions Listen and match the inventions with the dates.with the dates.abedc18761885192719
2、711976dabec18761976The telephone was invented before the computer.19271971The calculator was invented after the TV.Julie Thompsonbattery-operated slippersChelsea Lanmonheated ice cream scoopJayce Coziar Jamie Ellsworthshoes with adjustable heelsThey are used for seeing in the darkIts used for scoopi
3、ng cold ice creamThey are used for changing the style of the shoesBi Sheng invented the printing. Who was the printing invented by?The printing was invented by Bi Sheng.Printingpaper makinggun powdercompassThe passive voice.被动语态被动语态主动语态变被动语态的结构图主动语态变被动语态的结构图:Bell invented the telephone in 1876. The telephone was invented by Bell in 1876. 主语谓语动词过去时宾语时间状语主语谓语动词的过去分词宾语时间状语The passive voice.被动语态被动语态主动语态改被动语态主动语态改被动语态:Bellinvented the telephone in 1876.wasby
