Almost every new innovation goes through three phases.  
When initially introducing into the market, the process 1._____  of adoption is slow. The early models are expensive and  
hard to use, and perhaps even unsafe. The economic  impact is relatively great. 2. _____ The second phase is the explosive one, where the innovation  was rapidly adopted by a large number of people. It gets 3. _____  cheaper and easier to use and becomes something familiar.   And then in the third stage, diffusion of the innovation  
slows down again, as if it permeates out across the economy. 4. _____  During the explosive phase, whole new industries spring   up to produce the new product or innovation, and to service   it. For example, during the 1920s, there wasdramatic 5. _____  acceleration in auto production, from 1.9 million in 1920   to 4.5 million in 1929. This boom was accompanied with all 6. _____  sorts of other essential activities necessary for an   auto-based nation: Roads had to been built for the cars to 7. _____  run on; refineries and oil wells, to provide the gasoline;   and garages, to repair it. 8. _____  Historically, the same pattern is repeated again and again   with innovations. The construction of the electrical system   requested an enormous early investment in generation and 9. _____  distribution capacity. The introduction of the radio was   followedby a buying spree (无节制的狂热行为) by Americans   what quickly brought radios into almost half of all households 10. _____ 
by 1930, up from nearly none in 1924.  

答案  
1. introducing改 introduced; 2. great 改 small; 3. was 改 is; 4. as 后面的 if 去掉；5. was 后面加a; 6. with 改 by; 7. been 改 be; 8. it 改 them; 9. requested 改 required; 10. what 改 that.

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