48. A. sick　　　　 　B. tired　　　 　C. foolish　　　 　　D. excited

47. A. wash　　　　 B. repair　　 　C. drive　　　　 　D. leave

46. A. increase　　 　B. reduce　　 　C. improve　　　 　D. raise

45. A. thinking　　 　B. persuading 　C. deciding　　 　　D. learning

44. A. standing　　 　B. sitting　　 　　C. talking　　　 　D. dying

43. A. ago　　　　 B. after　　　 　C. before　　　　 　D. now

42. A. seemed　　　 B. struck　　 　C. sank　　　　　 D. showed

41. A. have　　　　 B. had　　　　 　C. having　　　　 D. have had

40. A. talk　　　　 B. think　　 　C. review　　　　 D. consider

(B)

Is the world really going mad? The other day I was sitting in a small restaurant 　41 　a quiet drink and a talk with a few friends, when it　 suddenly 　42 　me that almost everyone in the restaurant was smoking. It wasn't long 　43 　the whole room was filled with smoke. I asked with an apology for permission to open a window to stop myself 　44 !

Nowadays air pollution is something that we hardly question any more. However, I still can't walk down the streets in any of the big cities without 　45 　that people are suffering from the air pollution. It is time for the government departments the world over to introduce emission(废气排出)controls on all cars and 　46 　the public transport system(公共交通体系)to encourage people to 　47 their cars at home. A friend of mine takes flying lessons each morning and it really makes him 48 　when he climbs above the smog layer(烟雾层)and looks down 　49 　it and thinks:"I'm breathing that!"This kind of 　50 　results from the bad management of resources. Waste things can, 　51 　should, be treated properly. Housebuilding, road construction and industrial development are all earth-moving(or earth-reducing)operations and can change the balances of 52 created over millions of years. I would like to 　53 　serious studies done on all these main works before they are built. Also, there should be 　54　 national parks set up to keep the most beautiful parts of our countries in their natural 　55 .

39. A. to the point 　B. to our joy　 C. in pulic　　　 D. in other words