Why do plants grow in some places and not in others? Why does some land have so
题型：不详难度：来源：
Why do plants grow in some places and not in others? Why does some land have so much growing on it, while other land has almost no plants growing on it at all?
To grow, plants need several things. One is warmth. In very cold places almost nothing grows. Plants also need water. In very dry parts of the earth only a few unusual plants can grow. That’s why dry deserts everywhere are almost not covered by trees or grass.
Plants must also have a place in which to put down their roots and grow. They find it difficult to grow on hard land. The town is built on hard land. The plants here have only the soil found between the cracks of the stones to grow in.
Another thing plants must have before they can grow is food.
What will happen if we try to make things grow on the sandy beach? A few plants, such as beach grass, will grow in sand, but most plants won’t. Even if the weather is warm enough and we water the plants each day, many of them will die because the sand on this beach has almost no food for plants.
小题1:What things don’t most plants need to grow well according to the passage?
A．Warmth. B．Food. C．Sandy beach
小题2:What does the underlined word “cracks” mean in the passage?
A．表面 B．缝隙 C．夹层
小题3:From the passage, we know that it is for plants to grow in dry places.
A．difficult B．impossible C．important
小题4:The reason why most plants can’t grow on the sandy beach is that .
A．there isn’t enough sunlight
B．there is too much water
C．it has little food for plants
小题5:The passage can most probably be found in a book.
A．science B．history C．travel |
答案
小题1:C
小题2:B
小题3:A
小题4:C
小题5:A |
解析
试题分析：这篇短文主要描述了指物的生长环境的问题，介绍了植物为什么不能在一些环境条件生长的原因。
小题1:根据短文最后一段描述可知大部分植物不能在沙滩上生长，故选C。
小题2:联系下文of the stones to grow in.可知指的是石头的缝隙，故选B。
小题3:根据In very dry parts of the earth only a few unusual plants can grow.描述可知选A。
小题4:根据many of them will die because the sand on this beach has almost no food for plants.联系上文可知选C。
小题5:这篇短文主要描述了指物的生长环境问题，故最有可能在科学书籍中找到这类文章，故选A。
点评：本文中长句较多，一时很难读懂句子含义，注意多读几遍，不要强求非得理解一词一句的含义，能把握文章大意就行。然后带着问题阅读短文，一般就能顺利找出答题依据。对于不能直接找到根据的问题注意联系上下文，根据短文中心总结出正确答案。 |
举一反三
Millions of people around the world cook their food on fire every day. People must spend lots of money on cooking fuel. However, there is a much easier and cheaper way to cook food using energy from the sun.
Sun-cookers have been used for centuries. A Swiss scientist made the first sun-cooker in 1777. Today, people are using sun-cookers in many countries around the world. People use them to cook food and to heat drinking water.
There are three kinds of sun-cookers. The first is a box cooker. It is designed with a special wall that collects sun-shine into the box. A box cooker is good for slow cooking of a lot of food.
The second kind of sun-cooker is a panel cooker. It has several flat walls that concentrate the sun-shine on the food. People can build panel cookers quickly. They do not cost much. In Kenya, for example, panel cookers cost just two dollars.
The third kind of sun-cooker is a parabolic cooker. It has rounded walls that concentrate sunlight into the bottom of the cooker. Food cooks quickly in parabolic cookers. However, these cookers are hard to make. They must be moved again and again to follow the sun. Parabolic cookers can also cause burns and eye injuries if they are not used correctly.
You can make sun-cookers from boxes or heavy paper. They will not catch fire. Paper burns at 232℃. A sun-cooker never gets hotter than that. Sun-cookers cook food at low temperatures over long periods of time. This allows people to cook food and do other things at the same time.
小题1:What does the underlined word fuel mean?小题2:If you want to cook food quickly, which kind of sun-cooker is your best choice?| A．a box cooker | B．a panel cooker | | C．a parabolic cooker | D．fire cooker |
小题3:Which kind of sun-cooker costs very little?| A．a box cooker | B．a panel cooker | | C．a parabolic cooker | D．fire cooker |
小题4:Which of the following is TRUE?| A．The first sun-cooker was made by a Swiss soldier. | | B．Sun-cookers often get hotter than 232℃. | | C．Parabolic cookers can be dangerous sometimes. | | D．It is more expensive to cook with a sun-cooker than on fire. |
小题5:What is the best title of this passage?| A．How to Be a Good Cook? | B．Cooking Meals With the Sun | | C．How to Save Energy? | D．Different Ways of Cooking |
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完形填空。 （ 共20 分 ）（10 分， 每题 1 分）
The best way of _1_ a language is always using it. The best way of learning spoken English is reading in English as __2_ as possible. Sometimes you’ll get your words mixed up and people will not _3_ you. Sometimes people will _4___ things too quickly and you can’t understand them. But 5_ you keep your sense of humor ( 幽默感 ), you can always have a good laugh at the mistakes you 6_. Don’t be unhappy if people seem to be laughing _7__ your mistakes. It’s _8_ for people to laugh at your mistakes than be angry with you, __9__ they don’t understand what you are saying. The most important thing for learning English is: Don’t be _10__ of making mistakes because everyone makes mistakes.
小题1:A. Learnt B. learn C. Learning
小题2:A. much B. many C. a lot
小题3:A. like B. know C. understand
小题4:A. say B. tell C. speak
小题5:A. if B. since C. although
小题6:A.. have B. make C. produce
小题7:A. at B. on C. for
小题8:A.good B. better C. well
小题9:A. unless B. because C. as long as
小题10:A. worry B. unhappy C. afraid |
It’s over three years since I began to learn English. I’m glad that I am getting on well with it.
I find English quite difficult, but very interesting. When I first started, I thought I had only to remember the new words and learn some grammar I knew little about English idioms（习语）.I thought each English word had the same meaning in Chinese. When I learn to say“I see a book on the desk,” I thought the English word “see ” was just like the Chinese word “ kan ”，So one day when my teacher asked me,“ what are you doing?”, I answered， “I’m seeing a book.” “That’s wrong .” the teacher said, “you don’t see a book, You read a book. You can’t use English word like a Chinese one.. Be sure not to make the same mistake again.”
After that I began to pay more attention to the differences between Chinese and English. For example, in English we say a“ high mountain”, but a“ tall man. ” In Chinese we use the same word “gao ” for both.。Again in English we say“ take part in the sports meeting ”, “ attend the meeting ” and“ join the army,” while in Chinese we can use “can jia ” for all three. Interesting ，isn"t?
So to study English doesn"t only mean hard wok, it can be great fun, too! We not only have to pay attention to pronunciation, grammar spelling and handwriting, we also have to understand English idioms. We can learn English well only in the way!
But all this is only a beginning and I still have a long way to go. I’ll try my best and work even harder than before. I must speak and listen to English more both in and out of class. I must learn English well so that I can work well when I grow up.
小题1:I have learned English for ___________ years. | A．one | B．five | C．three | D．more than three |
小题2: When I first started English I ________________. | A．knew more English words | | B．knew more English idioms | | C．used an English word like a Chinese one | | D．found English easy and interesting |
小题3:I began to pay more attention to the differences between Chinese and English __________
A When I began to learn English
B. when I said“ I see a book on the desk.”
C. before I began to learn English
D. after the teacher told me not use an English word like a Chinese one.
小题4:We should speak and listen to English __________. | A．only in class | | B．out of class | | C．both in and out of class | | D．either in or out of class |
小题5:To study English well, we have to ______________.| A．remember the new words and learn more grammar | | B．know the differences between Chinese and English | | C．pay attention to pronunciation, spelling, handwriting and idioms | | D．do all the above things |
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What is your favorite color? Do you kike yellow, orange, or red? If you do, you must be an active person who enjoys life. Do you like blue? Then you are probably quiet, shy , would rather follow than lead.
Colors do influence our moods(情绪)。 A yellow room makes most people feel more cheerful and more relaxed than a dark green one; and a red dress brings warmth and cheer to the saddest winter day. On the other hand, black is depressing(令人压抑的). There was a black bridge over the Thames River near London,. The number of people who killed themselves on that bridge used to be larger than on any other bridge in the area-----until it was repainted green.
Light and bright colors make people not only happier but also more active. In the factory, the workers will work better, harder, and have fewer accidents when their machines are painted orange rather than black.
小题1: An active person may like_____________.
A. yellow, orange or red
B. yellow, black or red
C. orange, blue or black
小题2:Most people feel more ___________ in the yellow room than in a dark green one.
A. tired B. bored C. relaxed
小题3: Why did more people probably kill themselves on the black bridge than on any other bridge?
A.Because the bridge was too crowded.
B.Because people didn’t like the bridge.
C. Because the color of the bridge was depressing
小题4:In the factory, when the machines are painted orange, the workers will work _________.
A. worse B. harder C. more slowly
小题5: which would be the best title for the passage?
A. Your Favorite Color
B. The Secret of Color
C. The Color of a Bridge |
Air is a colorless, tasteless and invisible（看不见的）gas that is around us. An “empty” drinking glass and an “empty” room, in fact, are not really empty. Each is filled with air. When the glass is filled with water, the water pushes the air out of the glass.
Air, as a gas, has no definite shape, but because it is matter, it takes up space and it has weight. It is easy to prove that air is something that takes up space. Stuff a piece of dry cloth（布）into the bottom of a glass so that it will not fall out when the glass is turned upside down. Push the upside down glass, holding straight up and down, into a jar of water till the glass is completely covered. When the glass is taken out of the water, the cloth is still dry. The air inside the glass shows that it takes up space and keeps the water from coming in.
小题1:Since air is matter, it has ________.| A．room , and weight as well | B．both room and shape | | C．either room or weight | D．neither shape nor weight |
小题2:The word “Stuff” means ______ in Chinese. 小题3:The writer tells that the experiment（实验）___________.| A．is carried out in the space | B．must be done in the lab | | C．is made in the room | D．can only be done in the open air |
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