九年级上Modulefourunit2.pptVIP

* Can books be replaced by computers? I. Rewrite the sentences Jim has improved his skills at hurdles. 2. Kate made much noise last night. His skills at hurdles have been improved by Jim. Much noise was made by Kate last night. Revision 3. I will send an email to Mike. 4. Jim’s sister often hears him sing the song. An email will be sent to Mike ( by me). Jim is often heard to sing the song by his sister. 1. The book ______________ ( return) to you as soon as I finish reading it. 2. The mistakes _________________ already. ( correct ) 3.The bike can _____________( keep ) for two days. 4._______ the letter __________ ( receive ) yesterday ? will be returned have been corrected be kept Was received Advantages of books 1.Nice objects to own and hold 2.Often relatively cheap 3.Easy to use Disadvantages of books 1.Take up space 2.Get very dusty on shelves 3.Can be expensive 4.Not environmentally Advantages of computers 1.Store lots of information 2.Many “books” are free 3.Easy to find lots of obscure ( 难找的 ) books Expensive 2. Need to know how to use it correctly 3. Use electricity 4. You can lose everything if it “ crashses” 5. Not pleasant to read on screen, so sometimes need to print out Disadvantages of computers Match the main ideas with the paragraphs a--- b--- c--- d--- e--- Para 2 Para 3 Para 1 Para 5 Para 2 Bi Sheng ( 990-1051 AD) was the inventor of the first known movable type printing system. Bi Sheng‘s type was made of baked clay ( 烤过的陶土 ) and was invented in the 11th century Although paper existed in China before Cai Lun (since the 2nd century BC),he improved the way of making paper. 61—121 AD Why do we say the two inventions have changed our life ? 11th century 2,000 years ago Paper first created Printing developed Today Information downloaded from the Internet In the future Books may be replaced by computers Read the passage and answer the question Why were books expensive and rare before the invention of printing ? Why did ideas spread mo