Books could be produced more quickly and cheaply教案

 at a time表示“每次，一次”。如：please come in one at a time,not all together.請一個一個地進來，不要一起來。i’m sorry but i’m too busy to help you now__i can only do one thing at a time.真抱歉，我現(xiàn)在太忙了，無法幫你——我一次只能干一件事情。
by hand可以表示“手工地，親手地”。如：
  all these toys are made by hand, not on a machine.所有這些玩具都是手工制作的，不是機器生產(chǎn)的。you’d better deliver her invitation by hand since she lives so close.既然她住得這么近，你最好親自將邀請信送給她。
3）today information can be received online, downloaded from the internet rather than found in books…如今，信息可以在線接收、從因特網(wǎng)下載，而不必到書中尋找…
 rather than表示“而不是，勝于”。如：i want to wear the black shoes rather than the brown ones.我想穿那雙黑色的鞋，而不想穿褐色的。 everybody likes to go to the park rather than stay at home.大家都想去公園，而不愿呆在家里。
2、分段細讀課文，回答問題。
1）when was paper first created? why were books expensive and rare before the invention of printing?
2)were books produced by hand or by machine at first? what was the paper held against?
3)when was printing developed? why did ideas spread more quickly when books became cheaper?
4)what can be kept on cd-roms? what can we use to get information?
5）how are ideas spread in the past? how are ideas spread today?
3、嘗試復述課文（或部分段落），進一步熟悉課文內(nèi)容，理解知識點的運用。
4、朗讀課文。
step4、寫作練習
根據(jù)時間順序，簡要談一下書本的發(fā)展過程。大約70詞左右。（提示：2,000 years ago, 11th century, today, in the future）
【學以致用】
單項選擇
1.my mother told me that my homework must ________ on time.
a.finish                    b.be finish
c.be finished                d.finished
2.do you remember the trees which ________ by us last spring?
a.were planting              b.are planted
c.planted                   d.were planted
3. the sun _ _        ___ at night .
 a. can be seen     b. can't see     c. can't be seen     d doesn't see
4. good books __     __ again and again.
 a. should be readed   b. should be read   c. must read  d. may read