答案与简析：

　　76. famous前加上a。 （名词数）。 77. 正确 78. we前面加when，引导一个时间状语从句。（句子成分多分析） 79. them→us （逻辑错误须关注） 80. visiting→visited（非谓动词细辨别） 81. picture→pictures（名词数） 82. passes→passed（动词形） 83. 去掉down（习惯用法要记住） 84. and→but（but, and, or和so） 85. 去掉at（句子成分多分析 / 习惯用法要记住）。

 (一)

Most families in China hoped their single children will          76．_______

have a happy future, so they are very strict in their children.  77．_______

So do teachers in schools! Many children are given so much       78．_______

homework that they have hardly any spare time have sports.       79．_______

The children are forbidden to do anything but to study. No       80．_______

wonder so many children are tired of lessons. Some even          81．_______

attack or kill his parents and teachers! I believe many people   82．_______

already read this kind of news in newspapers or magazines.       83．_______

Shouldn't we draw lesson from the accidents? Now our             84．_______

government is making out a plan to solve the education problems. 85．_______

Although man has known asbestos （石棉） for many hundreds of years, it was not until 160 years ago that it was mined for the first time on the North American continent. H.W.Johns, owner of a New York City Supply Shop for roofers, was responsible for the opening of that first mine．
Mr.Johns was given a piece of asbestos which had been found in Italy． He experimented with the material and then showed its surprising powers to his customers. After putting on a pair of asbestos gloves, which looked much like ordinary work gloves, he took red-hot coals from the fireplace and played with them in his hands.How astonished the customers were to discover that he was not burned at all．You can well imagine that he had increasing business in asbestos roofing materials． However, because it was very expensive to transport them from Italy to the United States, Mr.Johns sent out a young scientist to seek a source nearer home. This young man found great vein（岩脉）, in the province of Quebec in Canada．
Ever since 1881 Quebec has led the world in the production of this unusual mineral, which is made up of magnesium, silicon, iron, and oxygen．When it is mined, the asbestos is heavy, just as you would expect a mineral to be．When it is separated, a strange thing happens: the rock breaks down into fine, soft, soapy fibres．
Scientists do not know why the rock can be separated easily into threads, but they have found thousands of uses of this fireproof material, of the so-called “cloth of stone”．
【小题1】Which title best expresses the main idea of this passage?

You wake up in the morning, the day is beautiful and the plans for the day are what you have been looking forward to for a long time. Then the telephone rings, you say hello, and the drama starts. The person on the other end has a depressing tone in his voice as he starts to tell you how terrible his morning is and that there is nothing to look forward to. You are still in a wonderful mood? Impossible!
Communicating with negative people can wash out your happiness. It may not change what you think, but communicating long enough with them will make you feel depressed for a moment or a long time.
Life brings ups and downs, but some people are stuck in the wrong idea that life has no happiness to offer. They only feel glad when they make others feel bad. No wonder they can hardly win others’ pity or respect.
When you communicate with positive people, your spirit stays happy and therefore more positive things are attracted. When the dagger (匕首) of a negative person is put in you, you feel the heavy feeling that all in all, brings you down.
Sometimes we have no choice but to communicate with negative people. This could be a co-worker，or a relative. In this case, say what needs to be said as little as possible. Sometimes it feels good to let out your anger back to the negative person, but all this does is to lower you to that same negative level and they won’t feel ashamed of themselves about that.
Negativity often affects happiness without even being realized. The negative words of another at the start of the day can cling to (附着) you throughout the rest of your day, which makes you feel bad and steals your happiness. Life is too short to feel negative. Stay positive and avoid negativity as much as possible.
【小题1】The purpose of the first paragraph is to ______.