单项选择题

Once, my uncle got ill. We called all the 11 in town, but no one knew 12 reason for his illness. Some said he was working too hard. 13 thought it was simply a case of fate (时运). I did not 14 any of them. So I found some 15 for him. It was cheap and I was told it 16 stop any illness. After taking the medicine my uncle got better. A few days later, a famous writer came to me and said he was dying of a 17 cold. He took the medicine, and was well again 18 two hours. If anyone falls ill now, 19 come to me. I was so happy with myself 20 I began to laugh. And then, I woke up!

A. just
B. still
C. yet
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