完形填空

　　Swimming is very popular in summer. People like swimming in summer because water makes them 1 cool. If you like swimming but swim in a 2 place, it may not be safe. These years, more than ten people 3 while they were enjoying themselves in the water and 4 of them were students. But some people are 5 not careful in swimming. They often think they swim so 6 that nothing can happen to them in water. Summer is here again. If you go swimming in summer, don’t forget 7 better swimmers have died in water. They died because they were not careful, not because they 8 swim. So don’t get into water when you are alone. 9 there is a“No Swimming” sign,don’t get into water, 10 . If you remember these, swimming will be safer.

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Not all memories (记忆)are sweet. Some people spend all their lives trying to forget bad experiences. Wars and traffic accidents can leave people with terrible physical and mental scars. Often they appear again in dreams.
Now American researchers think they are close to developing a pill(药丸), which will help people forget bad memories. The pill is designed to be taken immediately after a frightening experience. They hope it might reduce（减少）, or possibly erase(抹去) the effect of sad memories.
In November, some scientists tested a drug(药) on people in the US and France. The drug stops the body producing chemicals(化学品) that fix memories in the brain. So far the research has suggested that only the mental effects of memories may be reduced, not that the memories are erased.
The research has caused plenty of argument. Some think it is a bad idea, while others support it.
Supporters say it could lead to pills that prevent or treat soldiers’ troubling memories after war. They say that there are many people who suffer from terrible memories.
“Some memories can destroy(破坏) people’s lives. They come back to you when you don’t want to have them in a dream. They usually come with very sad feeling.” said Roger Pitman, a scientist of psychiatry at Harvard Medical School. “This could relieve(减轻) a lot of that suffering.”
But those who are against the research say that it is very dangerous to change memories because memories give us our identity(特质). They also help us all get away from the mistakes of the past.
“All of us can think of bad events in our lives that were terrible at the time but make us who we are. I’m not sure we want to erase those memories,” said Rebecca Dresser.
【小题1】The passage is mainly about __________.

IMAGINE a life without arms or legs! You can’t hold anyone in your   1 . You can’t walk anywhere with your feet. How would you last a day like that? Would you   2  at yourself in the mirror like Nick Vujicic, the 29-year-old Australian?
Nick was born without limbs（四肢）, so life was not   3  for him. At school many students played jokes on him   4  he looked different from everyone else. He was refused to be   5  friends, so he always felt   6 . However, he faced that bravely. He   7  to type and write with two toes（脚趾）at the age of six, and he could   8  surf and play golf. In college, he achieved great success and was among the   9  students in the studies. And he decided on   10  to do later in his life—to encourage others to work hard for their dreams.
Now Nick is one of the most popular   11  in the world. He travels to many countries and gives speeches about his story   12  difficulties. “Living life fully is about looking at what you   13 , not what you don’t have.” he said. His   14  encourages millions of people.
“I tell people to keep on getting up when they   15  and to always love themselves,” he said. “If I can encourage just one person, then my job in this life is done.”