The rockets take astronauts and man-made satellites into space. The satellites are used for communication, weather monitoring and research. But how do satellites stay up without falling down?
There are two opposite forces (力量) acting on the satellite. One of them is the force of gravitation (地心引力), which tries to pull the satellite towards the earth. The other force is created by the rotation (旋转) of the satellite around the earth. This force tries to take the satellite away from the earth. With these two forces, the satellite goes round and round. The gravitational pull of the earth (the force which pulls everything towards the ground) is like a rope which keeps the satellite from flying away.
Everything that goes up has to come down. It is only a matter of time before a satellite comes back to the earth. As time goes by, the satellite loses its speed, which makes the gravitational pull stronger than the force pulling it away. This makes the satellite crash (坠落) down to the earth. Which of the following uses of satellites is NOT mentioned?
| A．communication |
| B．monitoring the weather condition |
| C．doing some research |
| D．taking pictures |
The force that pulls the satellite towards the earth is created by ________.
| A．the earth |
| B．the satellite itself |
| C．the rotation of the satellite |
| D．the rope |
Why can’t the satellites fly away?
| A．Because of the force from the earth. |
| B．Because the satellite is too big. |
| C．Because of the force created by the rotation of the satellite around the earth. |
| D．Because people on earth have made ropes to tie the satellites tightly. |
The satellite will finally crashes down to the earth ________.
| A．when it flies faster |
| B．when its speed slows down |
| C．when people cut the rope |
| D．when there is no electricity in it |
Which of the following is TRUE according to the passage?
| A．There are four forces acting on the satellite. |
| B．The force of gravitation makes the satellite go round and round. |
| C．As time goes by, the satellite will finally fall down. |
| D．The satellite will stay in space forever. |
Look at these things. This is Mr. Wang’s ID card. And this is Jim’s watch, that’s Mary’s key. Gina’s notebook is over there. Look! What’s that on the floor? Oh, it’s gold ring. It’s Jenny’s ring. It’s very nice.
根据短文内容选择最佳答案。This is Mr. Wang’s ______.
| A．notebook | B．key | C．ID card | D．watch |
______ notebook is over there.
| A．Jim’s | B．Gina’s | C．Jenny’s | D．Mary’s |
Is this Jim’s watch? ______
| A．Yes, it is. | B．No, it isn’t. | C．Yes, he is. | D．No, he isn’t. |
Is Jenny’s ring very nice? ______
| A．Yes, she is. | B．No, she isn’t. | C．Yes, it is. | D．No, it isn’t. |
Americans usually eat three meals a day. Breakfast usually comes before eight o’clock in the morning. They usually have eggs, some meat, bread, fruit juice and coffee. Lunch is between twelve and one o’clock. It is like a light meal and working people must take lunch with them or get it near workplace.
Children in school take sandwiches, fruit, and cookies with them or eat in school. Supper, the main meal, is between six and eight in the evening. People cook it carefully. They may have meat or chicken, turkey and duck. They may all have potatoes or rice, vegetables or salad. The drink is coffee, tea or milk. Then comes the dessert.
根据短文内容选择最佳答案。Americans have breakfast ________.
| A．after eight o’clock | B．at eight o’clock |
| C．before eight o’clock in the morning | D．in the morning |
_______ is the most important meal in a day.
| A．Breakfast | B．Lunch | C．Meals | D．Supper |
Americans usually have breakfast and supper at ______.
| A．home | B．office | C．inn | D．work place |
When Americans have supper, _______ comes last.
| A．drink | B．meat | C．dessert | D．vegetables |
看图，选择最佳答案。
This is ______.
| A．Motorola 8008 | B．Siemens A55 | C．Nokia 8210 | D．Panasonic 2128 |
Is it a small radio? ______
| A．Yes, it is. | B．A radio. | C．No, it isn’t. | D．A video. |
Is that a good way of exchanging（交流）by phone? ______
| A．Yes, it is. | B．No, it is. | C．Yes, it isn’t. | D．No, it isn’t. |
Most animals protect(保护) their young until they are old enough to take care of themselves. A fish that swims in the rivers of South America protects its young in a very strange way. This fish, a kind of catfish, uses its mouth to keep its babies from danger(危险).
When this catfish lays(产卵) its eggs, it carries them in its mouth. From what we know, it does not eat during this time. After the eggs hatch(孵化), the fish swims with its young to protect them. It opens its mouth when danger appears(出现), and the tiny fish swim inside. They swim out only when it’s safe again.
These catfish may have a peculiar way to protect their young, but it seems(好像) to work.The best title(标题) is _____________.
| A．Staying Away From Danger | B．How A Fish Protect Its Young |
| C．Laying Eggs | D．A Cat That Swims |
The catfish in the story live in _________________.
| A．lakes | B．the sea | C．rivers | D．North America |
The young fish are ____________________.
| A．tiny | B．large | C．yellow and gold | D．very brave |
If the young fish were not near their parents, they would be ______________.
| A．safer | B．in greater danger | C．happier | D．less hungry |
The word “peculiar” in the story means ________________.
| A．easy | B．useless | C．strange | D．dangerous |
Everybody wants to be healthy. Everybody knows food is very important. There are many healthy foods. You can have more bananas, apples, oranges, tomatoes and lettuce because fruits and vegetables are good for you. But don’t eat too much chocolate. It’s not healthy food. Healthy food can make you strong and happy. Remember there is an old saying, “An apple a day keeps a doctor away.” Sports can also keep you healthy. Get up early and do sports every day. Don’t be lazy! You will be healthy and happy Which is right? _____________
A. Everybody is healthy B. We want to be healthy C. We are important What are healthy foods? _________________
A. Fruits and vegetables B. bananas, apples and chocolate C. Fruits and chocolate Why are healthy foods good for you? ________________
A. They make you happy. B. They make you grow strong.
C. They make you strong and happy.“An apple a day keeps a doctor away!” means ______________.
A. the doctor goes away when he sees an apple
B. the doctor runs away when you give him an apple
C. you eat an apple every day and you can be healthy. What keep you healthy?
A. Fruits and vegetables B. Healthy foods and sports C. Healthy foods