题目内容：

People often fall ill because of me.   36 , they can hardly blame me; it is largely their own   37 . A tired person may get   38 , especially when he goes to crowded places with polluted air. A sudden change in    39   is another factor. In hot summer, people turn on 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 40 . He still went to the cinema. Then he got back home and took a cold shower immediately.

I seized this golden chance to    41   him. He reacted, trying to    42   me, but I was already   43   deep in his throat. He kept sneezing(打喷嚏) and his nose was running.   44   he put on some warm clothes, it didn't work, for there were too many of us. Besides, his sore throat kept   45  him, and he developed a cough to force me and my family out, but   46   .

The next day he couldn't go to    47   .He had lost his appetite and was not as    48   as before. His mother made him orange juice every few hours for more vitamin C, which would help his   49   .

For two days he was   50   by his mother. As he rested more, his defense strengthened and I began lo feel the   51   . I knew I had to    52   him before long. But I am not the one who gives up easily, and I made every effort to fight back.   53   , it was my turn to feel   54   now, for his defense system was starting an all-out attack against me. I became    55   and finally my time was over.

Do you know what I am?

1. A. Therefore     B. Besides          C. However      D. Then

2. A. business          B. responsibility       C. excuse        D. fault

3. A. punished          B. blamed           C. caught         D. killed

4. A. temperature       B. season           C. place              D. condition

5. A. excited           B. hurt             C. late           D. tired

6. A. injure            B. bother           C. attack         D. destroy

7. A. get on with       B. get rid of           C. put up with    D. take hold of

8. A. reproducing       B. waiting          C. hiding         D. disappearing

9. A. Since             B. Once             C. Whether        D. Although

10. A. reminding        B. upsetting            C. comforting     D. influencing

11. A. escaped          B. succeeded        C. regretted          D. failed

12. A. bed              B. work             C. school          D. hospital

13. A. peaceful         B. afraid               C. active          D. happy

14. A. recovery         B. development      C. study               D. growth

15. A. protected            B. nursed           C. scolded         D. affected

16. A. loss             B. operation            C. pressure        D. movement

17. A. leave            B. catch                C. forget          D. beat

18. A. Uncertainly      B. Unsuccessfully   C. Unusually       D. Unfortunately

19. A. painful          B. disappointed     C. nervous         D. ashamed

 A. bigger          B. weaker           C. smaller         D. stronger