题目内容

---Have you finished your homework ?

---Yes, I have finished it.

A.yet; yet B. yet; already

C. already; already D. already; yet

 

B

【解析】

试题分析:句意:你完成你的作业了吗?是的,我已经完成了。already多用于肯定句,表示一事实 意为 已经 早已,yet则多用于否定句、疑问句,意为 还、尚、迄今、到那时。结合句意,故选B。

考点:考查词的用法

 

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There is an old saying in English, “Laughter is the best medicine”. Until recently, few people took the saying very seriously. Now however, doctors have begun to study laughter and the effects (作用) it has on the human body. They have found evidence(证据) that laughter really can improve people’s health.

Tests were carried out to study the effects of laughter on the body. People watched funny films while doctors checked their heart rate, blood pressure, breathing and muscles. It was found that laughter has similar effects to physical exercise. It increases blood pressure, the heart rate(率) and the rate of breathing. It also works several groups of muscles(肌肉) in the face, the stomach and even the feet. If laughter exercises the body, it must be helpful.

Other tests have shown that laughter appears to make the effect of pain on the body less. In one experiment doctors produced pain in groups of students who listened to different radio programs. The group which could bear the pain for the longest time was the group which listened to a funny program. The reason why laughter can make pain less seems to be that it helps to produce endorphins (内啡肽) in the brain. These are natural chemicals which make both stress and pain less.

There is also some evidence to suggest that laughter helps the body’s immune(免疫) system that is the system which fights infection (感染). In an experiment, one group of students watched a funny video while another group served as the control group — in other words, a group with which to compare the first group. Doctors checked the blood of the students in both groups and found that the people in the group that watched the video had an increase in the activity of their white blood cells that is the cells which fight infection.

As a result of these discoveries, some doctors and psychiatrists (精神病学) in the United States now hold laughter clinics, in which they try to improve their patients’ condition by encouraging them to laugh. They have found that even if their patients do not really feel like laughing, making them smile is enough to produce good effects similar to those caused by laughter.

1.We learn from the first paragraph that laughter________.

A. is good for one’s health

B. has strong effects to do with some illness

C. has been studied long since

D. has no effect on the body

2.Doctors have found that laughter_________.

A. keeps down blood pressure

B. has similar effects to physical exercise

C. decreases the heart rate

D. increases stress and pain

3.Which of the following statements is NOT true of laughter according to the passage?

A. It makes pain less.

B. It exercises the body.

C. It improves the body’s immune system.

D. It can cure cancer.

4.The main idea of this passage is that _________.

A. the doctors should learn how to make people laugh

B. there are several ways of studying the advantages of laughter

C. tests show that laughter can produce positive effects on human body

D. laughter and physical exercise have the same effects on human body

 

According to a new survey. Students’ safety has become a big problem. Nearly 50% of students say they are worried about robbery (抢劫) on the way to and from school. Now in some big cities in China, some schools have taught an unusual lesson: self-protection. Students like this lesson because there are no exams or boring classes. And they can learn how to save lives and know how to stop danger before it really happens.

Chen Haoyu, a teacher at Beijing No 25 Middle School gives young students advice on how to deal with danger:

If you are robbed

Keep calm. If you cannot cry for help or run away, give the robber your money. Try to remember what the robber looks like and tell the police later.

If you are in a traffic accident.

If a car hits you,you should remember the car number. If it is a bicycle, try to call your parents before you let the rider go. This is because you don't know how badly you are hurt.

If it is raining hard and there is lighting. (闪电)

Don’t stay in high places and stay away from trees.

When there is a fire.

Run away as fast as you can. Put wet things on your body and try to find an exit. Do not take the lift.

If someone is drowning(溺水)

If you can’t swim, don’t get into the water. Cry out for help.

Remember that danger is never as far away as you think. Take care of yourself at all times!

1.Why do students like the self-protection lesson?

Because there are no tests.

Because the lessons are boring

Because they can learn how to save lives.

Because they know how to stop danger before it happens.

A. ①② B. ②③ C. ①②④ D. ①③④

2.What will you do if a bicycle hurts you?

A.I will remember the bicycle number.

B.I won't let the rider go until I call my parents.

C. I will let the rider go before I call my parents.

D.I will let the rider go because I know how badly I am hurt.

3.If your house is on fire, you must ______ .

A. put dry things on your body

B. run quickly and take the lift

C. run away and find an exit as quickly as you can

D. take everything you have and then run away

4.There are _____ ways of self-protection mentioned in the passage.

A. 3 B. 4 C.5 D.6

5.The best title for this passage is ________ .

A. How to Keep Calm B. Self-protection C. An usual lesson D. Danger

 

Napoga is a 12—year---old girl in Ghana, Africa. It is hard for her family to get clean water . Every morning , she leaves home at half past five to get clean water for her family in a village far away . It takes her six hours to get enough clean water for daily cooking and drinking. She has no time to go to school or to play with her friends. Millions of people in the world are like Napoga . They can’t get enough clean water to keep healthy.

Earth Day is April 22. But on all other days, we must also remember it. The water we use is the most important natural resource(自然资源)on the earth.

Water covers 70 perent of the earth’s surface (表面). But most of that is sea water. We can’t use it for very many things. Fresh water covers only one percent of the earth’s surface.

You probably feel lucky that your life isn’t as hard as Napoga’s . But that doesn’t mean you don’t have to worry about water. We all face serious water problems. One of them is water pollution. All kinds of things from cars, factories, farms and homes make our rivers , lakes , and oceans dirty. Polluted water is very bad for people to drink. And dirty water is bad for fish , too. Now, thirty-four percent of all kinds of fish are dying out.

How do cars and factories make our water dirty? First, they pollute the air. Then , when it rains, the rain water comes down and makes our drinking water dirty. Dirty rain, called acid rain(酸雨), is also bad for plants ,animals and buildings.

Scientists say that in 30 years, more than half of the people in the world won’t have enough clean water. We have to learn how to save more water for ourselves and our children. Here is some advice for saving water:

● Turn off the water while you brush your teeth. You can save as much as 450liters(升)each month.

● Leaky taps (漏水的龙头)waste a lot of water. Fix them right away.

●You can easily cut your 10—minute showers in half---and you’ll be just as clean.

●When you wash dishes, don’t let the water run.

●Only wash clothes when you have a lot to wash. If your washing machine isn’t full , you are wasting water!

根据材料内容,选择最佳答案,并将其标号填入题前括号内。

1.Every morning Napoga went to get clean water _________.

A.before she went to school

B.after she finished school

C. without going to school

D.after she played with her friends

2.On the earth, _______________.

A.sea water is more widely used than fresh water

B.there is very little water for our living

C.there is 71 percent of fresh water

D.we don’t need to worry about water

3. Acid rain____________________________.

A.is only bad for living things.

B.can be produced in factories

C.doesn’t do harm to people , but it’s bad for plants, animals and buildings.

D.doesn’t just do harm to human beings but to animals, plants and buildings.

4.Which of the following wastes water?

A.We need ten minutes if we want a clean shower.

B.We should put in enough clothes when we wash them in washing machines.

C.You can keep yourself clean by having a shower for five minutes.

D.Don’t let the water run when we brush our teeth and wash dishes.

5.What’s the main idea of the passage?____________.

A.Something must be done to prevent water from being polluted.

B.Clean water means much to human beings and living things around us.

C.It’s time to take care of the water we use.

D.Water is the most important natural resource on the earth.

 

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