第二节：完形填空（共20小题；每小题1.5分，满分30分）
阅读下面短文，从短文后所给各题的四个选项（A、B、C和D）中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。
People often fall ill because of me. However they can hardly blame me: it is largely their own 31 . A tired person may get caught, especially when he goes to crowded places with polluted air. A sudden change in 32  is another factor. In hot summer, people 33  the air-conditioner upon returning home. They will catch a cold easily.
My latest victim is an energetic student. After school, he played football hard for two hours. Though 34  , he still went to the cinema. Then he got back home and took a cold shower immediately.
I seized this golden chance to  35  him. He reacted, trying to  36  me, but I was already  37 deep in his throat. He kept sneezing(打喷嚏) and his nose was running.  38  he put on some warm clothes, it didn’t  39 , for there were too many of us. Besides, his sore throat kept 40 him, and he developed a cough to force me and my family out, but  41   .
The next day he couldn’t go to  42  .He had lost his appetite and was not as   43  as before. His mother made him drink orange juice every few hours for more vitamin C, which would help his  44  .
For two days he was  45  by his mother. As he rested more, his defense strengthened and I began to feel the  46 . I knew I had to   47 him before long. But I am not the one who gives up easily, and I made every effort to fight back.  48 , it was my turn to feel  49  now, for his defense system was starting an all-out attack against me. I became weaker and finally my time was  50   .
Do you know who I am?
31. A. fault                   B. conclusion                C. responsibility           D. business
32. A. season                B. temperature                     C. condition                  D. place
33. A. turn up              B. adapt to                    C. apply to                   D. turn on
34. A. tired                  B. hungry                     C. late                          D. excited      
35. A. bother                B. attack                       C. injure                       D. destroy
36. A. look out for        B. take hold of                     C. put up with             D. get rid of  
37. A. repeating            B. rebuilding                C. reproducing                     D. replacing
38. A. Although       B. Unless                       C. Since               D. Whether
39. A. spread           B. use                           C. work                        D. react
40. A. upsetting        B. influencing                 C. reminding                D. frightening
41. A. failed            B. escaped                  C. won                         D. succeeded
42. A. hospital                B. school                        C. bed                          D. work
43. A. afraid            B. smart                         C. ambitious                 D. active
44. A. study             B. development           C. recovery                   D. growth
45. A. affected                B. rescued                  C. nursed                     D. protected
46. A. pressure            B. loss                           C. pain                         D. movement
47. A. accept            B. leave                      C. avoid                       D. beat
48. A. Unfortunately  B. Unwillingly        C. Unusually                  D. Uncertainly
49. A. awful            B. ashamed                     C. painful                            D. puzzled
50. A. over              B. in                              C. around                            D. on