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阅读下面短文，从短文后所给各题的四个选项（A、B、C和D）中，选项出可以填入空白处的最佳选项。
Leroy Columbo left his lifeguard post．He walked slowly down the 1 ．Many people were sunbathing on the sand,and they spoke to him．Leroy nodded and smiled to them． 2 ,he always kept an eye on the water．You see,Leroy was a 3 lifeguard．He couldn't hear cries for help;therefore,he 4 use his eyes．He could 5 a person in trouble in the water quickly．
Leroy was a familiar 6 on the Galveston,Texas beaches．During his 40 years of work as a lifeguard there he 7 907 people from drowning in the waters．
Leroy was born in 1905．He lost his 8 at seven．Nine years later,because of his father's death,Leroy left school and helped 9 his family．However,Leroy didn't need much money to swim in the waters around Galveston Island,so he spent most of his free time swimming and becme a(n) 10 swimmer．
At eighteen,his brother asked him to 11 the Surf Toblggan Club．He had to take a(n) 12 first before the club could 13 him．He had to swim three hours without stopping．He couldn't 14 rest by floating or swimming on his 15 ．Leroy took the test and passed it easily．
Leroy never won a scholarship．He never 16 training for sports competition． 17 ,he used his talents（才能）to save others' lives． 18 he died on July 2,1974,members of the Texas State Senate stood for a moment of 19 in his honor．The Galveston people have had a plaque（牌匾）made in his 20 ．His name was included in the Guinness Book of World Records．
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