A professor(教授) told his students to go into the city slums(贫民窟) to study the life of 200 boys. He asked them to write reports about each boy's 1ife and future. One of the students wrote, “They don't have {#blank#}1{#/blank#} hope．”
Twenty-five years later，{#blank#}2{#/blank#} professor read about the earlier study. He told his students to find out {#blank#}3{#/blank#} had happened to the boys. They tried very hard and{#blank#}4{#/blank#} that 176 of the boys had become successful as doctors, teachers and scientists.
The professor was very surprised and{#blank#}5{#/blank#} to study it further．Luckily, all of them were living near the place and he was able to ask each one, “What made you successful?” Each one answered, “It was a {#blank#}6{#/blank#} .”
The teacher was{#blank#}7{#/blank#} living there, so the professor found her and asked the old woman what she had done to {#blank#}8{#/blank#} those boys out of the slums, and change them into{#blank#}9{#/blank#} people.
The teacher's eyes began to shine and said {#blank#}10{#/blank#} a sweet smile, “It's really very easy. I love those boys.”

You may think there is nothing but sand in the desert of the world, but it is not true. In the desert we can{#blank#}1{#/blank#} stones. We can see hills, too. There is a little rain in the {#blank#}2{#/blank#}  , but it is not{#blank#}3{#/blank#}  for most plants.
　　The animals are {#blank#}4{#/blank#} to the desert people in many ways. The desert people eat the meat and drink the milk of the animals. They use their skins to {#blank#}5{#/blank#} shoes, water bags and even tents(帐篷). They use the camels(骆驼) for{#blank#}6{#/blank#}  things.
The people of the desert have to keep {#blank#}7{#/blank#}  from places to place. They must always look for grass or desert plants for their animals. They usually live in the tents. When there is mo more food for their animals, they take down their tents, put them on the camels and move to {#blank#}8{#/blank#} place. The desert people are very{#blank#}9{#/blank#} . No man in the desert would ever refuse to help the people in {#blank#}10{#/blank#}  and give them food and water

A Brief History of Time

    Stephen enjoyed writing books. In 1988 he{#blank#}1{#/blank#} A Brief History in Time. This book covered modem subjects on cosmology such as the big bang and black holes in terms that could be understood by the{#blank#}2{#/blank#} reader. The book became very popular selling millions of {#blank#}3{#/blank#}and remaining on the London Sunday Times best-seller list for four years. He had since written many more books{#blank#}4{#/blank#} A Briefer History in Time, On the Shoulders of Giants, and The Universe in a Nutshell.

    Do more activities{#blank#}1{#/blank#} puzzles, word games and learn a new language. These activities will help you improve your memory.

    Try to have more free time. When you are tired, you will find ways to get rid of stress, so your brain will be {#blank#}2{#/blank#} and ready to have new ideas.

    You need {#blank#}3{#/blank#} seven hours of sleep every day. Give your brain cells much time to {#blank#}4{#/blank#} the damage done by a day's tiring work. Eat lots of fruit, vegetables and grain. Do your best to be healthy, and these foods help you to improve your memory.