【正文】
invented D. discovered。 heard D. so。 ? — Don’ t mention it . I’ m glad you like ,很高興你喜歡。讓我們一一起走向發(fā)明的前源吧。Unit 6 When was it invented? Section A New words 樣式;款式 項目;工程 高興;愉快 每日的;日常的 網(wǎng)站 先鋒;先驅(qū) 列表;列清單;名單;清單 提到;說明 style project pleasure daily website pioneer list mention 人類的每一次改革都是社會前進的步伐,每一次思想的升華都越來越接近文明。 5 2 4 1 3 Look at the things. In what order Do you think they were invented? 1a first second third fourth fifth Listen and match the inventions with the years. 1b 1876年