SECTION C (12 points)
Direction: Complete the following passage by using one word that best fits the context.
Winter swimming has become popular in Beijing. Many years ago,  48  people would go swimming in the city waters. But now there is a winter swimming club,   49   has more than 2,000 members. The oldest is 84 years of age and the youngest is only 7. The members are from all walks of life. They may be workers, peasants, soldiers, teachers and students. Even though it is now the coldest time of the season and the water   50  is around 0℃, many winter swimmers still swim in the icy waters. They enjoy   51   in the lake, while people by the water are wearing   52  clothes.
Why are so many people interested in winter swimming? Because it can do   53  to your health.
Bei Sha is   54  good example, he is 69 years old, and he once suffered from heart trouble for 26 years. After ten years of winter swimming, he is now   55  good health.