完形填空。 John left the United States in 1969 to work in Africa. Africa was hot. When John 1 to the United States in 1979, he said to himself, ' It's much 2 here than it was before I left. I'm going to 3 an electric heater (电热器). Besides, everything is much more 4 .' John went to a store the next day to buy an electric heater. The salesman 5 him three or four 6 kinds and then said, ' And this is our best electric heater. It 7 a lot, but it 8 half of your electricity (电), and electricity is very expensive now, isn't it?' 'Yes, it's very expensive,' John answered, ' and it's becoming 9 every year.' He looked at the electric heater carefully, thought for a few seconds and then said, 'Well, I'll take 10 of these, then I'll save all of my electricity.' (     )1. A. wrote (     )2. A. hotter (     )3. A. buy (     )4. A. modern (     )5. A. borrowed (     )6. A. old (     )7. A. has (     )8. A. saves (     )9. A. better (     )10. A. one B. pointed B. colder B. see B. B. lent B. bad B. gets B. needs B. worse B. two C. listened C. better C. make C. expensive C. sold C. same C. costs C. becomes C. hotter C. four D. returned D. noisier D. sell D. beautiful D. showed D. different D. brings D. produces D. cheaper D. three