题目
题型：不详难度：来源：
Some scientists believe that birds do sing some of the time just because they are happy．However they sing most of the time for a very different reason．Their singing is actually a warning to other birds to stay out of their territory．
Do you know what a “territory” is? A territory is an area that an animal, usually the male, claims (声称) as its own．Only he and his family are welcome there． No other families of the same species are welcome．Your house is your territory where only your family and friends are welcome．If a stranger should enter your territory and threaten you, you might shout．Probably this would be enough to frighten him away．
If so, you have actually frightened the stranger away without having to fight him．A bird does the same thing．But he expects an outsider almost any time, especially at nesting (筑巢) season．So he is screaming all the time, whether he can see an outsider or not．This screaming is what we call a bird’s song, and it is usually enough to keep an outsider away．
小题1:Some scientists believe that most of the time bird’s singing is actually ______．
| A．an expression of happiness | B．a way of warning |
| C．an expression of anger | D．a way of greeting |
| A．A place where families of other species are not accepted. |
| B．A place where a bird may shout at the top of its voice． |
| C．An area for which birds fight against each other． |
| D．An area which a bird considers to be its own． |
| A．Because they want to invite more friends． |
| B．Because their singing helps frighten outsiders away． |
| C．Because they want to find outsiders around． |
| D．Because their singing helps get rid of their fears． |
| A．By comparing birds with human beings． |
| B．By reporting experiment results． |
| C．By describing birds’ daily life． |
| D．By telling a bird’s story． |
答案
小题1:B
小题2:D
小题3:B
小题4:A
解析
试题分析：文章介绍了鸟为什么会唱歌，大部分鸟的歌声是一种警告，为了保护自己的领地不被外来者侵犯。
小题1:细节题：从第二段的句子：However they sing most of the time for a very different reason．Their singing is actually a warning to other birds to stay out of their territory．可知鸟唱歌是一种警告，选B
小题2:猜词题：从第二段的句子：A territory is an area that an animal, usually the male, claims (声称) as its own.可知这个单词是“领地”的意思。选D
小题3:细节题：从文章最后一段的句子：This screaming is what we call a bird’s song, and it is usually enough to keep an outsider away.可知在筑巢的时候鸟的歌唱是为了赶走外来者。选B
小题4:细节题：从第一段的句子：After all, you probably sing when you are happy. Some scientists believe that birds do sing some of the time just because they are happy. However, they sing most of the time for a very different reason.可知作者解释鸟的歌唱是把它和人相比较。选A
核心考点
试题【Have you ever wondered why birds sing? Maybe you thought that they were just hap】；主要考察你对题材分类等知识点的理解。[详细]
举一反三
Food for space has to be packed in special ways．Some of it goes into tubes that a man can squeeze into his mouth．Bite-sized cookies are packed in plastic．
There is a good reason for covering each bite．The plastic keeps pieces of food from traveling in the spaceship．On the earth very small pieces of food would simply fall to the floor．But gravity doesn’t pull them to the floor when they are out of the plastic in a spaceship．They move here and there and can get into a man’s eyes or into the spaceship’s instruments． If any of the instruments is blocked, the astronauts may have trouble getting safely home．
As astronauts travel on longer space trips, they must take time to sleep． An astronaut can fit himself to his seat with a kind of seat belt. Or, if he wants to, he can sleep in a sleeping bag which is fixed in place under his seat．But be careful he must put his hands under the belt when he goes to sleep．This is because he is really afraid that he might touch one of controls that isn’t supposed to be touched until later．
小题1:Why would astronauts cover each bite of food in space？____
| A．Because small pieces of food would fall down to the floor． |
| B．Because weightless pieces of food might make trouble when they travel around． |
| C．Because they haven’t enough food for longer trips． |
| D．Because astronauts don’t want to waste food． |
| A．walk just as they do on the earth． |
| B．not eat anything because it’s dangerous． |
| C．control the spaceship when they are sleeping． |
| D．not litter small things or it will make trouble． |
| A．Because he thinks it is comfortable to sleep in that way in space． |
| B．Because he doesn’t want to touch any controls when he sleeps． |
| C．Because the instruments of the spaceship are easily broken． |
| D．Because he is afraid that the seat will move． |
| A．Eating and Sleeping in Space |
| B．How Astronauts Eat in Space |
| C．Food for Space |
| D．How Astronauts Sleep in Space |
A study of 1,000British people has been done by Chris,a British professor and director of the Sleep Assessment and Advisory Service in the UK.It looked at the six most common sleeping positions and which personalities tend to match them.Have a look.
1. Fetus (胎儿) position – This is the most common sleeping position. About 41 percent of the participants said they sleep in this position. These sleepers may appear to be strong but they are usually sensitive (敏感的) and shy. The more they curl (蜷缩) up, the more worried they are.
2. Log position (树干睡姿) – This is the second most common position. People who sleep like a log are usually stubborn.
3. Yearner position (向往型睡姿) – This position says that you are open-minded and eager (急切的) to face challenges.
4. Soldier position – These sleepers lie on their backs with their arms down and close to the body. They are usually reserved and quiet.
5. Freefall position – People who sleep in this position are outgoing (外向的) but feel a lack of control in their lives. This is the least comfortable position.
6. Starfish position – People who sleep like this are good listeners, helpful, and uncomfortable being the center of attention.
小题1:What is the main idea of this passage?
| A．Sleeping position decides personality. |
| B．Sleeping position reflects personality. |
| C．What the six different sleeping positions are like. |
| D．Different people have different sleeping positions. |
| A． | B． | C． | D． |
| A．Those sleeping in fetus position are always strong. |
| B．Those sleeping in log position changes their ideas easily. |
| C．Those sleeping in freefall position usually feel uncomfortable in their lives. |
| D．Those sleeping in starfish position may feel uneasy when focused on. |
| A．Fetus | B．British people | C．People surveyed | D．Sleepers |
The scientist’s knowledge must be exact. There’s no room for half right or right just half the time. He must be as nearly right as the conditions permit. What works under one set of conditions at one time must work under the same conditions at other times. If the conditions are different，any changes the scientist observes in a demonstration(实证)must be explained by the changes in the conditions. This is one reason why investigations are important in science. Albert Einstein，who developed the Theory of Relativity，arrived at this theory through mathematics. The accuracy(正确性)of his mathematics was later tested through investigation. Einstein’s ideas were proved to be correct. A scientist uses many tools for measurements. Then the measurements are used to make mathematical calculations(计算)that may test his investigations.
小题1:What makes a scientist according to the passage？
| A．The tools he uses. | B．His ways of learning. |
| C．The way he uses his tools. | D．The various tools he uses. |
| A．the importance of information |
| B．the difference between scientists and ordinary people |
| C．the importance of thinking |
| D．the difference between carpenters and ordinary people |
| A．works under one set of conditions at one time and also works under the same conditions at other times |
| B．doesn’t allow any change even under different conditions |
| C．leave no room for improvement. |
| D．can be used for many purposes |
| A．Scientists are different from ordinary people. |
| B．The Theory of Relativity. |
| C．Exactness is the core(核心)of science. |
| D．Exactness and way of using tools are the keys to making of a scientist. |
Explore your library. Visit your local library to borrow books and magazines that your kids haven’t seen before. Many libraries have summer reading programs, book clubs, and reading contests(比赛) for even the youngest borrowers. With a new library card，a child will feel extra grownup by borrowing books.
Read on the road. Going on a long car trip？Make sure there are some books at the back seat. When you stop driving，read the books aloud. Get some audio books in libraries and listen to them together during driving time.
Make your own books. Pick one of your family’s favorite parts of summer—whether it’s baseball，ice cream, or the pool—and have your child draw pictures of it or cut out pictures from magazines. Stick(粘贴) the pictures onto paper to make a booklet(小册子)and write text for it. When you’re done，read the book together. Reread it whenever you like!
Keep in touch. Kids don’t have to go away to write about summer vacation. Even if your family stays home，they can send postcards to tell friends and relatives about their adventures(冒险经历). Ask a relative to be your child’s pen pal and encourage them to write each week.
Keep up the reading habits. Even if everything else changes during the summer，keep up the reading habits around your house. Read with your kids every day—whether it’s just before bedtime or under a shady tree on a lazy afternoon. And don’t forget to take a book to the beach！Just brush the sand off the pages — it’s no sweat!
小题1: The purpose of the passage is to________.
| A．encourage parents to read |
| B．give advice on raising kids |
| C．raise a good summer reader |
| D．suggest places for vacations |
| A．visit the local library and join book clubs |
| B．borrow some audio books to listen to |
| C．keep in touch with friends by sending postcards |
| D．read your own picture books with your son |
| A．taking away the sand on the book is very difficult |
| B．a special book is needed when you’re reading on the beach |
| C．one can remove the sand on the book with a brush easily |
| D．there’s no trouble reading even on the beach |
| A．Parents. | B．Students. | C．Teachers. | D．Editors. |
| A．During summer vocation, kids’ reading skills must grow cold. |
| B．Kids have to go away to write about summer vacation. |
| C．With a library card，a child will feel extra grownup by borrowing books. |
| D．Because everything else changes during the summer，it is hard to keep up the reading habits. |
Organic mulch improves the condition of soil. As the mulch breaks down, it provides material which keeps the soil from getting hard. This improves the growth of roots and increases the movement of water through the soil. It also improves the ability of the soil to hold water. Organic mulch contains nutrients for plants. It also provides good environment for earthworms and other helpful living things in the soil.
It is easy to find organic mulch materials. Cut-up leaves and small pieces of tree bark can be used. Grass cuttings are also a good mulch for plants. Mulch from news- papers works well in controlling weeds.
The best time to add mulch depends on your goal. Mulch provides a thick barrier between the soil and the air. This helps to reduce temperature changes in the soil. As a result, mulched soil will be cooler than other soil in the summer. In winter, the mulched soil may not freeze as deeply as other soil. The best time is after the ground has frozen, but before the coldest weather arrives. Spreading mulch before the ground has frozen may attract small animals searching for a warm place to spend the winter. Delaying the spreading should prevent this problem. The animals will probably find another place to live.
小题1:The author tells us the following EXCEPT ______.
| A．what mulch is and its advantages |
| B．the best time to add mulch |
| C．the bad effects of mulch |
| D．what can be mulch on the soil surface |
| A．tree barks | B．plastic | C．grass cuttings | D．cut-up leaves |
| A．improve the condition of soil |
| B．improve the ability of the soil to hold water |
| C．provide a good environment for earthworms |
| D．improve the growth of roots and increase the movement of water through the soil |
| A．the best time to add mulch is in spring and summer |
| B．the best time to add mulch is after the coldest weather arrives |
| C．the best time to add mulch is exactly the same time of each year |
| D．choosing the best time to add mulch can avoid attracting small animals |
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