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.
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 |
Please point out which box will not fall.
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 |
There are four people in my family. My father is a policeman. His work is kind of dangerous. He’s very busy. He often has meals outside. Sometimes we can’t see him all day. But I love him very much. My mother is a bank clerk, but she wants to be a reporter. She says her job is a boring and being a reporter is interesting, because she can meet many interesting people. My brother is a waiter. He likes his work, because he thinks he can meet many new friends when he works.
I’m a middle school student. I study hard because I want to be a teacher. I think it’s not difficult for me. My family has four people, my father, my mother, my sister and I.
My father works in another city, so we can’t see him all day, sometimes.
My mother likes to be a bank clerk.
My brother works in a restaurant. He likes to make new friends.
I want to be a teacher. It’s easy for me, I think.
Mary and Her Friends
Mary has some friends. They are Betty, Peter, Alice and Mike. Mary is the oldest of the five. Betty is thirteen years old. She is younger than Mary and older than Peter. Alice is nine and Mike is seven.
Betty and Peter are good runners（长跑运动员）. But Peter runs faster. Mary and Betty like to play basketball. Mary plays better than Betty. Alice sings best of them.
Mary and Betty study in a middle school. Peter, Alice and Mike study in a primary（小学）school. They all work hard at school. But Betty works hardest. Her handwriting（书法）is good, too. Mary has _______ friends.
| A．four | B．five | C．six | D．three |
Mike is ______ than Alice.
| A．youngest | B．oldest | C．younger | D．older |
Peter runs _______ than Betty.
| A．faster | B．slow | C．faster | D．the fastest |
Betty’s handwriting is _______.
| A．worst | B．good | C．better | D．best |
They all ______ .
| A．study in the same school | B．like to play basketball |
| C．good runners | D．work hard |
阅读理解判断正(T)误(F)
Reading papers
Many people sleep late on Sunday morning,but others don’t.However,almost everyone reads the paper.
The Sunday paper is usually very thick.It has many advertisements(广告)and many different parts.The parents in the family like the front page,and the world news page.Many men also read the sports page.
Most men don’t read the women’s pages,but the mother of the family usually does.The women’s pages have the news about parties,food,health and clothes.Most Sunday papers have interesting stories.Children enjoy them.Old people read the death notices(讣告).They tell about who have died during the week.The parents in the family like sports page.
The father of the family usually read the women’s pages.
Only old women read the death notices.
Almost everyone likes reading the Sunday paper.
This passage is about the Sunday paper
阅读理解
February 11th is the birthday of the most famous American inventor,Thomas Alva Edison.Edison was born in 1847.He was not a good student when he was a young boy.His teacher said he was one of the most dumb headed(笨头笨脑的)students .He did badly in many subjects and left school after only three months.So his mother took him home and taught him herself.Edison didn’t like school at all,but he loved science.He liked to ask questions.
One day his father found him sitting on some eggs.His father asked him why.The boy didn’t answer.He asked his father instead,“Why can’t I hatch(孵化)chickens,but hens can?”
Edison invented 1328 things in his life,and these things made our lives more comfortable(舒适的)and the world more beautiful.People will never forget him.Edison was born.
| A．in winter | B．one hundred years ago | C．in Canada | D．in January |
Edison’s teacher said.
| A．he was one of the cleverest boys | B．he was a good student |
| C．he was not a good student | D．he could learn many things |
Edison’s mother.
| A．taught him at home | B．taught him at school |
| C．was a teacher | D．took him to another school |
One day Edison sat on some eggs.He.
| A．liked to sit there | B．wanted to break the eggs |
| C．wanted his father to look for him | D．wanted to hatch chickens |
We now know Edison.
| A．was a good student | B．was a dumb headed student |
| C．was very clever | D．wasn’t famous |
阅读短文，在空格内填入适当的词，首字母已给
I am Sue Smith. I w____1____ in a hotel in London. It is n __2_______Central Station. I go to work b 3car every day.
My hotel is v 4big. There is a beautiful(美丽的) g 5in front of the building. There are seventy r 6in the hotel building, and three restaurants(餐馆) and five bars(酒吧). B 7the building there is a swimming pool. It is o 8every day. In s___9____ there are always a lot of people swimming in the pool.
I love my work. And I love my h 10, too.