Unit 6 When was it invented ?GRAMMAR/STRUCTURESVOCABULARYTARGET LANGUAGEsection A (1a)Talk about the history of inventions/When was it invented ?section A (1b)//／section A (1c)//／section A (2a)/／／section/ A (2b)／／／section A (2c)／／what are they used for? They are used for...section A (2d)／It's my pleasure.= My pleasure. =with plea/sure 我的荣幸 , seem+to+动词原形 好像做某事, such a great inven/tion/ 如此伟大的一项发明, think/ of = think about 想到，考虑, have a point 有道理 /section A (3a)／by accident 偶然地，意外地 , over an open fire 在篝火上, fall into(过去式fell into)=drop into掉进…, spread 传播,at a low price 以很低的价格， bring(brought) sth. to sp.把某物带到某处, all of a sudden 突然地, less than少，不到 more than = over /过, without doubt 毫无疑问 , at that time 在那时 , advise sb (not) to do sth建议某人(不要)做某事,. start doing /sth 开始做某事 ,work on /sth 致力某事 ,.(be) similar to 与……相似 , the Olympics 奥/运会, by mistake 错误地，无意地 ,make a mistake 犯错 it mentioned t/hat 它提到,It is said that 据说 ,It is believed that人们相信,section A (3b)／／／section A (3c)／／／Grammar foucs 被动语态/／section A (4a)／//se |
