Every object has weight．But the center of its weight is not always in the middle of the object．If the top of ail object is heavier than its bottom (底部)，it will fall over easily．We say that its center of gravity (重力) 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 (铁) in the bottom of this box．It will not fall，because its center of gravity is above its bottom．
If the bottom of an object is its top，it will fall over easily．
| A．1ighter than | B．heavier than |
| C．no heavier than | D．as heavy as |
Please point out which box will not fall．
The reason why the Leaning Tower of Pisa does not fall is that ．
| A．the top of the tower is heavier than its bottom |
| B．the bottom of the tower is not heavier than its top |
| C．its center of gravity is still above the line of its bottom |
| D．its center of gravity is not above the line of its bottom |
A SCHOOL REPORT
Name: EdwardSchool: Kelvin Grove High School
Grade: 7Term ending: May 6th
Subjects:
Math: He is a little weak in this but he has tried his best to catch up with others.
English: He is the best in the class. Keep it up.
French: His reading is very good, and he can remember many words.
History: He is familiar(熟悉) with the names of many places in the world.
Music: He doesn’t like pop music, though he sings very well.
Conduct: Fair No. in class: 9 Absence(缺课): 8
Remarks: Edward can do a lot better. More work is needed next term.
Class teacher: Ivy
Principal: M. L. Martin
School reopens: September 11__ After reading this, we know this is.
| A．a studying plan of Edward Scott |
| B．A teaching plan of Ivy |
| C．a school report of Edward Scott |
| D．a working plan of M. L. Martin |
__ Which of the following is Not mentioned(提到) in the form?
| A．PE. | B．Music. | C．Math | D．History. |
__Edward’s best subject is.
| A．Science | B．English | C．geography | D．History |
__Edward is not good at.
| A．Science and geography | B．Math and history |
| C．French and history | D．music and English |
__According to the form, which of the following sentences is true?
| A．Edward can’t sing songs very well. |
| B．Edward doesn’t do well in science. |
| C．Edward can do better if he works harder next. |
| D．Edward learns two foreign languages in school. |
Many people go to school for education. School education is very important and useful ,but no one can learn everything from school. A teacher ,no matter how much he knows ,cannot teach his student everything .His work is to show his students how to learn .He teaches them how to read and how to think . So much more is to be learned outside school by students themselves.
It’s always more important to know how to learn by oneself than to learn some facts or formulas （公式）by heart. It’s quite easy to learn some facts in history or a formula in maths, but it’s very difficult to use them. Edison and Einstein didn’t get everything from school, but they were all successful. They invented so many things. The reason for their success is that they knew how to study .They read many books outside school .They worked hard all their lives, wasting not a single moment. The most important thing is that they know how to use their brains（大脑）。__Students can’t learn everything in school because _____________.
| A．the teacher doesn’t know much |
| B．the teacher can only teach them how to read and write |
| C．the teacher would not like to teach |
| D．there are still many things for the students to learn outside |
__A teacher’s work is ________
| A．to teach all subjects |
| B．to teach everything |
| C．to teach the students how to read and think |
| D．to work hard |
__To know how to _____is much more important than facts or formulas by heart.
| A．work out math problems | B．remember all the facts |
| C．study science | D．study |
__Why did the famous scientists become successful ? Because______
| A．they know how to study |
| B．they remembered all the formulas |
| C．they didn’t get everything from school |
| D．they didn’t know how to use their brains |
__Which is WRONG according to the passage?
| A．Outside school study is as important as school study |
| B．It’s more important to know how to learn than only remember some facts and formulas. |
| C．It’s very easy to use a formula in working out a math problem. |
| D．It’s helpful to read more books outside school. |
Mike was a small boy,and he didn't like washing his hands.Every day his mother said to him: "Mike,your hands are very dirty again.Go and wash them."But Mike never washed them well.He only put them in the water for a minute and took them out again.
Mike's aunt lived in another street. One day,she came to stay with Mike's parents,and she came with her small son,Ted.Ted was a year younger than Mike,and he didn't like washing his hands,either .First the boys were with their parents,then they went to play.When they were sitting,Mike looked at Ted's hands and said: "My hands are dirtier than yours.""Certainly they are." Ted answered,"you are a year older than I am."
判断正误：Mike always washed his hands carefully.
Mike was older than Ted.
Ted's hands were a little cleaner than Mike's.
Mike's aunt lived in the street next to his house.
Mike's hands were dirtier than Ted's because he was older.
The westerners have more vacation days than us. Some people like to stay at home during their vacation. They work in the garden, visit their friends, read books or watch television. Many families take their lunch to a park or somewhere far from the city. They like to eat under some trees or near a nice lake. If they live near the sea, they often go to the seaside. There they can fish, swim or enjoy the sun.
The westerners like travelling. They think travelling and outdoor activities are the parts of their lives. They work hard to save money, but their main purpose(目的) is to travel.
Most western students often make use of their vacation to camp. There are thousands of camp interesting bases(基地) in western countries. They can swim, go fishing, attend lectures, and take part in many other recreational(娱乐性的) activities there. It can help them wrest from the secrets of nature, train(训练) their viability(生存能力), and teach them how to be self-reliant (自立).Some westerners like to ______ at home during their vacation.
| A．clean their rooms | B．cook their meals |
| C．work in the garden and watch TV | D．go fishing |
Many families often take their lunch out and have it ______.
| A．under some trees | B．near the city |
| C．near the sea | D．in the restaurants |
______ is very important for the westerners.
| A．Working hard | B．Travelling | C．Saving money | D．Going camping |
What does the underlined phrase “wrest from” mean here?
| A．取得 | B．保守 | C．认识 | D．探索 |
The passage mainly tells us ______.
| A．how the westerners spend their vacation |
| B．the westerners have more vacation days than us |
| C．different views on vacation between the westerners and the easterners |
| D．teach the western students how to be self-reliant |
Joe Brown had a shop where he sold meat.One day a woman came into the shop at five to one."I'm sorry I'm late."she said, "I need some more meat for my dinner tonight."Joe had only one piece of meat in his shop.He took it out of the fridge and said:"This is $ 6.50."
"That piece is too small."the woman said, "haven't you got anything bigger?"Joe went into the room behind his shop,took the meat into the fridge,took it out again and closed the door with a lot of noise.Then he brought the piece of meat to the woman and said:"This piece of meat is bigger and more expensive.It's $ 8.75."
"Good." the woman said with a smile, "give me both of them, please?"What was Joe Brown?
| A．A bookseller. | B．A shopkeeper. | C．A conductor. | D．A gateman. |
When did the woman come into the shop?
| A．Late in the evening. | B．At midnight. |
| C．Early in the morning. | D．Early in the afternoon. |
Why didn't the woman want that piece of meat at first? Because
| A．it was too cheap | B．it smelt bad | C．it cost too much | D．it wasn't big enough |
How many pieces of meat were kept in the fridge?
| A．Only one piece of meat. | B．Two pieces of meat. |
| C．Several pieces of meat. | D．Many pieces of meat. |
Could Joe give the woman both pieces of meat?
| A．Certainly. |
| B．Of course not. |
| C．He would try his best. |
| D．The story doesn’t give us the answers. |