When my wife, who is Spanish, spent her first winter in London a few years ago, she used to ask me time and again：“Where’s the fog?”Almost all foreigners 1 to find the city full of yellow – grey fog for most of the years．Dickens, who was 2 responsible for painting this 3 in people’s minds, certainly wasn’t joking in those days．In the nineteenth century people used to say 4 someone attempted to kill himself by 5 into the Thames, he would be choked by the fog and poisoned by the terrible 6 of the river before he had time to drown himself．In fact, the situation has 7 only in recent years．When I was a boy in London thirty years ago, I was often unable to see 8 of the road when I left home on winter mornings．
The key steps that have turned London into one of the 9 cities in the world were 10 at the end of the 1950s．But Londoners still find it 11 that fog hardly returns．Actually the 12 took place as a result of two main improvements．Factories were forced to fix equipment for air cleaning 13 close down, and local people were not allowed to 14 coal unless it was smoke – free．But the 15 incredible miracle in London occurred 16 1964 when the Thames Water Authority began to pump vast 17 of dissolved oxygen into the river． 18 , varieties of fish that had gradually disappeared from the Thames since 1800 have 19 , and some are 20 caught by fishermen outside the House of Parliament(议会)．
In my third year as a high school athletics coach, I gave a speech telling students and parents about the benefits of football．I gave the same 1 each year, aimin g at recruiting(招收)new team members．I talked about 2 football wasn't just for 3 athletes and how everyone could 4 from it．This year, a 5 looking couple approached me after my speech．They said their son really wanted to play football．They had tried to 6 him out of it, but he had his heart 7 on joining the team．
When they told me his name, my heart sank．Michael was five feet and ten inches tall and weighed about 108 pounds．He was a 8 boy, the constant target of other kids' jokes, and as far as I knew he had never 9 sports．I knew he would never 10 it through football practice, let 11 as a player．But we told them we could give it a try．
On the opening day of practice, Michael was the first player on the field, we did 30 minutes of warming-up 12 starting a one-mile jog around the track．I 13 my eye on Michael．At 50 yards he fell, and I helped him to his feet．“Michael,”I said,“Why don't you just 14 the mile?”He said in tears that he wanted to run with the others, so I let him go on． 15 he fell, but each time 16 himself up．
The same thing happened every day for weeks, and Michael gained strength both 17 and physically．By the last week of practice, Michael could run the mile without falling, we had 18 only one game that season, 19 the team cheered louder for Michael's run than the victory they had, Afterward, Michael approached me, and I told him how 20 I was of him．
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