People often fall ill because of me.36 , they can hardly blame me; it is largely their own

People often fall ill because of me.36 , they can hardly blame me; it is largely their own37 . A tired person may get38 , especially when he goes to crowded places with polluted air. A sudden change in 39is 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 41him. He reacted, trying to 42me, but I was already43deep in his throat. He kept sneezing(打喷嚏) and his nose was running.44he put on some warm clothes, it didn't work, for there were too many of us. Besides, his sore throat kept45 him, and he developed a cough to force me and my family out, but46.

The next day he couldn't go to 47.He had lost his appetite and was not as 48as before. His mother made him orange juice every few hours for more vitamin C, which would help his49.

For two days he was50by his mother. As he rested more, his defense strengthened and I began lo feel the51. I knew I had to 52him 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 feel54now, for his defense system was starting an all-out attack against me. I became 55and finally my time was over.

Do you know what I am?

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