图是上海世博会使用的两种降温方法：冰块降温和喷雾降温。冰块降温，是因为冰块变成水的 （填物态变化名称）过程需要从周围吸收大量的热；喷雾降温，是因为水雾在 （填物态变化名称）过程中也要从周围吸收大量的热。
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Not all ads play tricks us, though. PSAs use some of
same methods as commercial ads, like attractive pictures and clever language. They aim to teach us and help us
better lives. Our government has been using PSAs to educate people
many years. One of these is, “
you smoke cigarettes, you are slowing killing
. All of these ads
meant to benefit the public, and you can often learn a lot by following the advice they give. Finally, when
comes to advertisements, we must be intelligent and not be a slave to them.
Most Americans don’t like to get advice ___ (strange)”. When they need advice, they don’t usually go to people they know. Instead， many of them write
to newspapers and magazines ___
give advice on many different subjects
(include) family problems, the use of language, health, cooking, child care, clothes, and even on how to buy _
house or a car.
Most newspapers(regular) print letters from readers with problems. Along with letters there are answers written by people who are supposed to know
to solve such problems. Some of these writers are doctors, _
__ are lawyers or educators. But two of the most famous writers of advice are women without special
(train) for this kind of work.
A young man, while travelling through a desert, came across a spring of clear water. water was sweet. He filled his leather container so that he could bring some back to an elder
had been his teacher. After a four-day journey, the young man
(present) the water to the old man. His teacher took a deep drink, smiled
(warm), and thanked his student very much for the sweet water. The young man went home
a happy heart.
After the student left, the teacher let student taste the water. He spat it out,
(say) it was awful. Apparently, it was no longer fresh because of the old leather container. He asked his teacher, “Sir, the water was awful. Why did you pretend to like
？” The teacher replied，“You tasted the water. I tasted the gift. The water was simply the container for an act of kindness and love. Nothing could be
(sweet)．”
We understand this lesson best we receive gifts of love from children. Whether it is a cheap pipe or a diamond necklace, the proper response is appreciation. We love the idea within the gift rather than the thing.
Mrs. Wilson, ______is the wife of a rich man, ___
___(invite) some of her friends to lunch. She was trying a new way to cook fish and she was very pleased with herself ____
___the fish was ready. As the fish was very hot, she put it near the open window to cool for a few minutes. Five minutes later, when she came back for it, she was __
__(surprise) to find the neighbor’s cat staring at the fish. She was in time to stop the cat before it was too late. That afternoon every one enjoyed the fish. They talked and laughed ___
_ four o’clock.
After the guests left, Mrs. Wilson felt tired ____happy. She was sitting down in a chair near the window when she saw the neighbor’s cat __
_(die) in her garden, she was sure the fish was bad. What
____happen to her friends? She at once telephoned the family doctor for help, the doctor would like each guest _
__(meet) him. Once again Mrs. .Wilson was alone in her chair still tired but no longer happy, just then the telephone rang. ____
__was her neighbor, “oh, Mrs. Wilson” he cried, “My cat was killed by a car and put in your garden.”
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