题目列表(包括答案和解析)
Every object has weight. But the center of its weight is not always in the middle of the object. If the top of an object is heavier than its bottom, it will fall over easily. We say that its center of gravity is high. But if the bottom is heavier, it won’t fall easily. Then we say that its center of gravity is low.
Look at the first picture. This empty box must fall over, because its center of gravity (C) is not above the line of its bottom (AB).
Now look at the second picture. There is some heavy iron in the bottom of this box. It will not fall, because its center of gravity is above its bottom.
1.If the bottom of an object is ______ its top, it will fall over easily.
A. lighter than B. heavier than C. no heavier than D. as heavy as
2.Please point out which box will not fall.
3.The main idea of the passage is _________.
A. why things fall over B. a low center of gravity
C. a high center of gravity D. that everything has weight
Every object has weight. But the center of its weight is not always in the middle of the object. If the top of an object is heavier than its bottom, it will fall over easily. We say that its center of gravity is high. But if the bottom is heavier, it won’t fall easily. Then we say that its center of gravity is low.
Look at the first picture. This empty box must fall over, because its center of gravity (C) is not above the line of its bottom (AB).
Now look at the second picture. There is some heavy iron in the bottom of this box. It will not fall, because its center of gravity is above its bottom.
【小题1】If the bottom of an object is ______ its top, it will fall over easily.
| A．lighter than | B．heavier than | C．no heavier than | D．as heavy as |
| A．why things fall over | B．a low center of gravity |
| C．a high center of gravity | D．that everything has weight |
Two weeks ago, Ruichang City in Jiangxi Province was hit by an earthquake measuring 5.7 on the Richter scale(里氏震级). It killed 18 people and left hundreds homeless.
Earthquakes are one of the most deadly natural disasters(灾难) in the world. They happen more often than you would expect.
In the 24 hours after you read this, 400 to 500 earthquakes will shake the earth. You won't notice most of them because you live in a relatively(相对地) safe area or the quake is too far away or because the quake will be too small to notice.
Earthquakes are caused by sudden breaks in rock masses(群) deep in the earth. Rock masses are always under very high pressure. If the pressure in a certain area become too much and the rock masses break, an earthquake happens. But exactly when the rock masses reach the breaking point is a mystery(谜).
China is on the Eurasia(欧亚) plate, where earthquakes happen very often due to the earth's plates knocking against each other. Up to 17,139 earthquakes have taken place in China in the past 44 years, according to scientific research.
1What happened to the City of Ruichang?
A.18 people were killed in an earthquake.
B. Hundreds homeless people left the city.
C. An earthquake ruined thousands of houses there.
D. An earthquake measuring 7.5 on the Richter scale happened.
2How many earthquakes can happen in a day in the world?
A. 24. B. 44. C. 400 to 500. D. 17139.
3Why does the earth quake? Because ______.
A. we live in a relatively safe area
B. the pressure in the earth is too big
C. the rock masses is reaching the breaking point
D. the rock masses break suddenly deep in the earth
C
Once upon a time a woman found she was not easy to wake up in the morning as early as she wished. So she bought a beautiful alarm clock. These clocks are so made as to strike with loud whirring noise at any hour the owner pleases to set them.
The lady placed her clock at the head of the bed, and at the right time she found herself roused by the long, rattling sound.
She got up at once, and felt better all day for her early rising. This lasted for some weeks. The alarm clock faithfully did its duty, and was plainly heard so long as it was obeyed.
But, after a time, the lady grew tired of early rising. When she was waked by the noise, she merely turned over in bed, and slept again.
In a few days, the clock ceased to wake her from her sleep. It spoke just as loudly as ever; but she did not hear it, because she had been in the habit of not obeying it.
Finding that she might as well be without it, she made up her mind that when she heard the sound she would jump up.
Just so it is with conscience(自觉意识，诚意). If we will obey its voice, even in the least important things, we can always hear it, clear and strong.
But if we allow ourselves to do what we have some fears may not be quite right, we shall grow more and more sleepy, until the voice of conscience has no longer power to wake us.
4Why did the clock failed to stop to get the woman up later?
A. Because she was tired of getting up early in the morning.
B. Because she could not hear the clock any more.
C. Because she was too tired to wake up at it.
D. Because the clock stopped to do its duty.
5 Both the underlined words “whirring” and “rattling” are kinds of ______.
A. colours B. sounds C. actions D. feelings
6 The writer mainly wants to tell us that ______.
A. we should always obey our clocks
B. the clock sometimes can’t wake us up as we wish
C. It is conscience that ensures early rising not the clock
D. The voice of conscience has no longer power to wake us.
Amy was a dear little girl, but she was too ready to waste time in getting ready to do her tasks, instead of doing them at once as she ought to.
In the village in which she lived, Mr. Thornton kept a store where he sold fruit of all kinds, including berries in their season. One day he said to Amy, whose parents were quite poor, “Would you like to earn some money?”
“Oh, yes, ” replied she, “for I want some new shoes, and papa has no money to buy them with.”
“Well, Amy,” said Mr. Thornton, “I noticed some fine, ripe blackberries in Mr. Green’s field today, and he said that anybody was welcome to them. I will pay you thirteen cents a quart(度量单位) for all you will pick for me.”
Amy was delighted at the thought of earning some money; so she ran home to get a basket, intending to go immediately to pick the berries.
Then she thought she would like to know how much money she would get if she picked five quarts. With the help of her slate(书写板) and pencil, she found out that she would get sixty-five cents.
“But supposing I should pick a dozen quarts,” thought she, “how much should I earn then?” “Dear me!” she said, after figuring(测算) a while, “I should earn a dollar and fifty-six cents.”
Amy then found out what Mr. Thornton would pay her for fifty, a hundred, and two hundred quarts. It took her some time to do this, and then it was so near dinner time that she had to stay at home until afternoon.
As soon as dinner was over, she took her basket and hurried to the field. Some boys had been there before dinner, and all the ripe berries were picked. She could not find enough to fill a quarter of a quart.
As Amy went home, she thought of what her teacher had often told her---“Do your task at once; then think about it,” for “One doer is worth a hundred dreamers.”
7How many times did Amy figure with her slate?
A. 3. B. 4. C. 5. D. 6.
8The underlined sentence may mean “______”.
A. she got ready to waste some time to do her tasks
B. she thought it was a waste of time to do her tasks
C. she liked to waste time when should do her tasks immediately
D. she was not ready to get her tasks ready, and it’s a waste of time
9What can we infer from the story?
A. Amy’s family was very poor.
B. Amy was good at counting with a slate.
C. Mr. Thornton was the richest person in the village.
D. Amy would learn a better lesson from this affair than from school.
10 The best title of the passage may be “_____”.
A. The Money Amy Did Not Earn
B. The Girl Did Not Like To Waste Time
C. Amy, A Good Student To her Teachers
D. A Poor Girl Wanted To Earn Some Money
One day, Allan and his friend Henry went swimming in a river. It was very hot. How happy they were in the river! After they got out of the water, they played games in the sun for a while.
On their way back, Henry saw some flowers. He liked flowers very much and ran into the green field to look at them. Now Allan was walking by himself.
Then he heard Henry calling out, "A snake（蛇）! Help!..."
"What's wrong with you?" asked Allan.
"A snake bit（咬）me in the leg. Come here!"
Allan ran over and saw a small red wound（伤口）on Henry' s leg.
"The snake was in the grass. I didn't see it."
"Sit down quickly"! Allan told Henry.
Allan put his mouth at the little red wound and began to suck（吸）at it. In this way he saved （挽救）Henry's life. "Oh, Allan, it's very kind of you to help me."
"That's all right. We are friends and we must always help each other."
【小题1】It was________ when-Allan and Henry went out.
| A．hot | B．cold | C．raining | D．wet |
| A．the whole morning | B．for 2 hours | C．long | D．for a while |
| A．Allan; leg | B．Allan; head | C．Henry; leg | D．Henry; head |
| A．workers | B．good friends | C．brothers | D．farmers |
| A．Henry went to look at the flowers with Allan. |
| B．Allan saved Henry' s life. |
| C．Allan saw the snake. |
| D．They ran to the hospital at once. |
On Sunday morning, I usually get up very late. I wash my face, and then go out to do morning exercises. It is about 8: 40 am. After I eat my , I often go to a shopping centre my mother. The shopping centre is our home, so we walk there. It takes us about 20 minutes to get there. The shopping centre has a good . It is called“蓝莓购物中心”in Chinese. It doesn’t have an English name. Can you it in English? It is new and big. There are many things there, such as TVs, fridges, computers, clothes, food drinks. There are many every day. There are men and women, the old and the . do many people come here to buy things? Do you know? Let me tell you. The workers there are always nice and friendly. The things there are usually good but not . If you come to my home, I can take you there and have a look.
1.A. breakfast B. lunch C. supper D. dinner
2.A. for B. to C. of D. with
3.A. near B. not far C. at D. far from
4.A. flower B. place C. name D. room
5.A. say B. speak C. tell D. talk
6.A. but B. with C. or D. and
7.A. students B. people C. children D. teachers
8.A. tall B. short C. young D. small
9.A. What B. Who C. Why D. When
10.A. expensive B. cheap C. big D. new
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