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Lesson 21: Books or Computers?,Learning aim: 1. Learn about the history of the books. 2. Know about the fountain of the printing press. Learning important points: 1. Why is the printing press important? 2. How did books change information?,,New words,Press appear modern electronic sell,Think About It,How many books have you read this year? Have you ever read an e-book? Do you like them？,Language Points,1. In ancient times, there were no books, and people passes on their knowledge by telling stories. 在古代，沒有書，人們通過通過講故事傳遞知識。 by是介詞，后面可以加名詞或動名詞短語，意為“通過……方式（途徑）”。如： I learn English by listening to tapes. 我通過聽磁帶學英語。,2. It took a long time to write just one book. 僅僅寫一本書就要花費很長一段時間。 句型It takes sb. some time to do sth. 意為“某人花費多長時間做某事”，it是形式主語，真正的主語是動詞不定式“to do sth.”；take 隨時態(tài)改變，本句用的是一般過去時態(tài)，所以用took。如： It took me two hours to clean my house yesterday. 我昨天用了兩個小時打掃房子。,P2,鏈接：,(1) spend…on / in …意為“花費”，主語是表示人的名詞或代詞，spend后接表示金錢或時間的詞，on后接名詞，in后接V-ing形式，也可省略in。如： I spent twenty yuan on the dictionary. 我花二十元錢買的這本字典。 They spend one hour doing their homework every day. 他們每天花費一小時做作業(yè)。,P1,P3,(2) cost意為“花費”，主語是表示物的名詞或代詞，常用于“sth. cost sb. some money”。如： The pen cost me ten dollars. 這支鋼筆花了我十美元。 (3) pay…for…意為“為……付款”，人作主語，常用pay some money for sth，pay的過去式和過去分詞為paid。如： My mother paid 30 dollars for her sweater. 媽媽買這件毛衣花了三十美元。,Exercises,I. 根據(jù)所給漢語提示，完成下列句子。 1. A computer is a useful _______ (機器). 2. There are two ________ (印刷) presses in our school. 3. What's the meaning of the second _________ (段落) in the text? 4. ________ (哪一條) way shall we go? 5. I bought a book about _______ (現(xiàn)代的) history yesterday.,modern,machine,printing,paragraph,Which,II. 用所給單詞的適當形式填空。 1. I think the Internet is ______________ (important) than the printing press. 2. The novel __________ (write) by Qiong Yao. 3. We can find information ______ (quick) on the Internet. 4. The machine can make __________ (thousand) of books a day. 5. If you ______ (forget) the telephone number, you could look it up in the book.,forgot,more important,was written,quickly,thousands,III. 連詞成句。 1. hand, the, by, model, was, plane, made __________________________________ . 2. get, how, you, information, did, the __________________________________? 3. the, answer, English, questions, in, please __________________________________ . 4. the, Internet, people, lets, quickly, information, search, for _______________________________________ . 5. much, sound, travels, than, faster, light __________________________________ .,Light travels much faster than sound,The model plane was made by hand,How did you get the information,Please answer the questions in English,The Internet lets people search for information quickly,同學們,來學校和回家的路上要注意安全,同學們,來學校和回家的路上要注意安全,