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Association, which advocates finding treatment and a cure for ALS. And many of those who¡¯ve taken the challenge donated as well.

ALS is a rare disease that gradually reduces patients¡¯ muscle strength, finally making them become unable to speak, move, swallow and breathe. In North America, ALS is commonly known as Lou Gehrig¡¯s disease, after the star baseball player who died of the disease in 1941 at the age of 38. The best¡ªknown ALS patient today is British scientist Stephen Hawking. While most people with ALS survive only two to five years after diagnosis(Õï¶Ï), Hawking has had the disease for decades. The medical treatment for ALS is very expensive and cannot be covered by most social welfare programs. This creates difficulties for many ALS patients and their families, both physically and mentally.

¡°Due to the ice bucket campaign, many people beginning to know about ALS. With more people aware and more people taking part in the fight against ALS, we can calmly work with not only other ALS organizations, but also with medical companies to speed up new treatments for people affected by the disease,¡± said Barbara Newhouse, President and CEO of The ALS Association.

51. Why does the author mention many famous people in Paragraph 1? A. To stress the popularity of the Ice Bucket Challenge. B. To advise us to learn from them. C. To prove they are generous.

D. To introduce the target group of the Ice Bucket Challenge. 52. Paragraph 2 is mainly about the Ice Bucket challenge¡¯s ____ .

A. influence. B. purpose. C. rules. D. development. 53. The person who is nominated for the challenge is required to ____ . A. donate $100 to The ALS Association. B. watch others videos on social media. C. help find effective treatments for ALS. D. pour ice water on himself within time. 54. What do we know about ALS from the text? A. ALS is fairly common now. B. Lou Gehrig was first cured of ALS.