Health is very _____and every student knows t...

Health is very _____and every student knows the _____of keeping healthy.

A. important ; importance　　 B. important ; important

C. importance; importance　　 D. importance; important

九年级英语单项填空简单题查看答案及解析

Health is very _____and every student knows the _____of keeping healthy.

A． important ; importance 　　　　 B． important ; important

C． importance ; importance 　　　　 D． importance ; important

九年级英语单项填空中等难度题查看答案及解析

Health is very _____and every student knows the _____of keeping healthy.

A．important ; importance    B．important ; important

C．importance ; importance    D．importance ; important

九年级英语单项填空中等难度题查看答案及解析

Fishing is a popular activity and every fisherman knows the rule: Keep the big ones, throw the smaller ones back. The idea behind Lt is simple - the larger fish are probably older. If you keep the smaller ones, they won’t be able to reproduce, and the fish population is in danger.

But fishing out the largest fish from a population has an unwanted effect: Over time, fewer adult fish get really big. If only the smaller fish reproduce（繁殖）, then future generations become smaller. This is an example of evolution（进化） in action.

One scientist, Dr David Conover has spent the last decade studying the effects of the “keep the big ones” rule and if they can be reversed（颠倒）.

To set up his experiment, Conover and his team caught hundreds of silverside fish and divided them into six groups. For two groups, Conover followed the “keep the large ones” rule and took out the biggest fish. For two other groups, he removed only the small fish.

For the last two groups, he removed fish at random (随意的).

After five years, he measured the fish in each group. In the two groups where the largest fish were regularly removed, the average fish size was smaller than the average size in the other groups. Here was evolution in action: If only small fish survive to reproduce, then future generations of fish will also tend to be small.

For the second five years of his experiment, Conover changed the rules and took fish randomly from each group. At the end of the experiment, he found that the fish that were in the “keep the large ones” group for the first five years had started to get larger again, although he calculated it would take at least 12 years for the fish in that group to return to their original size.

In other words, it takes less time to shrink(变小) than it does to recover.

1. The underlined word “it” (Line 2) refers to “　　　　　　　 ”

A. the activity        B. the fish

C. the rule            D. the fisherman

2.Why do many people follow the “keep the big ones, throw the small ones back” rule?

A. It helps to protect fish numbers.

B. It helps to protect fish size.

C. It is the custom in most countries.

D. They will be punished if they don’t.

3.What did Conover find after the first five years of his experiment?

A. The “keep the big ones” rule made no difference to fish size.

B. The “keep the big ones” rule made fish smaller on average.

C. The “keep the big ones” rule made the fish bigger on average.

D. The “keep the big ones” rule affected all fish populations in the same way.

4. What is the author’s intention in writing this article?

A. To encourage people to fish more carefully.

B. To urge governments to change the rules of fishing.

C. To describe the results of a scientific experiment.

D. To introduce the rules of fishing to readers.

九年级英语阅读理解中等难度题查看答案及解析

根据短文内容及所给提示，在文中的空白处填写一个正确的单词。

Health is very important. As we all know, people want to keep 1.(health). But how can we do that? Here are some 2.(way) to keep in good health. I think we should eat more vegetables 3. fruits. Because there are a lot of vitamins in them. We shouldn't eat butter, cheese, chocolate or drink coffee. Because they 4. a lot of sugar and fat. They are 5. (harm) to you. It can make you become fatter and 6.(fat). In a word, we'd better have a 7.(balance) diet. We also need to take exercise every day and have 8.good rest, so that we can keep fit. By the way, we shouldn't stay up too 9. and we'd better not10.(smoke). In this way, I'm sure that we can become very strong.

九年级英语语法填空中等难度题查看答案及解析

Frank is a student. He likes playing with his phone very much. And he keeps the phone with him at all times. His dad thinks he is addicted (上瘾的) to his phone. But Frank doesn’t think so. They write to each other.

1.How long does Frank’s dad advise him to give up his phone?

A.For a week. B.For a month.

C.For a year. D.Forever.

2.How many teenagers are addicted to the phones according to the passage?

A.Thirty percent B.Forty percent

C.Fifty percent D.Sixty percent

3.What does Frank think of social media, games and apps?

A.They make him smart.

B.They make him relaxed.

C.They help him make lots of money.

D.They help him keep in touch with his friends.

4.What can we learn from the passage?

A.Frank thinks it is a waste of time to use phones.

B.Frank sometimes uses his phone to look up something.

C.All teenagers depend on their phones too much.

D.Frank’s dad thinks it’s OK to check basketball scores at dinner time.

九年级英语阅读单选中等难度题查看答案及解析

One of the easiest and cheapest ways to help your health is just to sleep eight hours or more every night, but more and more people in the world are not sleeping enough. According to the World Health Organization, over half the people in the world may be sleep-deprived. The result of this is not just a lot of tired people; in the United States alone, sleepy drivers cause at least 100,000 car accidents, and 1,500 deaths a year. Problems with sleep can also cause mental （心理的） problems, as well as medical problems such as high blood pressure and heart problems.

American culture values work and often doesn’t value sleep. In fact, people who sleep a lot are often called “lazy”. Many famous men say proudly, “I only have time to sleep four or five hours a night.” Students, especially college students, often sleep only a few hours a night. They often say, “I’m used to sleeping only a little.”

But according to experts, sleep is like money. If you sleep only five hours a day, you don’t “get used to it”, but instead, build up a “sleep deficit （亏损）”. “It’s like a credit card （a card used to buy things or services）,” says Dr. James Maas, “You are only borrowing time. You always have to pay it back.” The more hours you don’t sleep, the more hours you should sleep to “pay back” the hours on your “sleep credit card”. For example, if you sleep four hours on Monday and then sleep eight hours on Tuesday, on Wednesday you will still have a “sleep deficit” of four hours. This deficit can continue for months or even years. People with a “sleep deficit” are sleep-deprived. Driving and making decisions can be dangerous for these people.

Another research shows people should sleep nine or ten hours every night. More than half the people in the world may be running a “sleep deficit”. You didn’t do your homework last night? Maybe you can tell your teacher that you were working hard on your sleep deficit.

“Don’t think you will be doing less work because you sleep during the day. That’s a foolish idea which is held by people who have no imagination. You will be able to do more,” said Winston Churchill.

1.How many hours do we need to sleep every day if we want to keep healthy?

A. 7.　　 　　 B. 6.　 　　 C. 11. 　 D. 8.

2.What does the underlined word “sleep-deprived” mean?

A. Easily sleepy.　　 B. Having difficulties falling asleep.

C. Short of sleep.　　 D. Afraid of sleeping.

3.From the passage we know sleep-deprived people ________.

A. are easily tired　　　

B. most likely cause traffic accidents

C. can have both mental and medical problems

D. have all the above problems

4.What Winston Churchill said means ________.

A. sleep more during the day, work more at night　　

B. sleep during the day influences your work

C. people who sleep during the day have no imagination

D. sleep during the day is helpful to your work

5.Which of the following may be the best title for the passage?

A. Sleep and Health　　

B. The Less Sleep, the More Danger

C. Work Less, Sleep More　

D. Pay Back Your Sleep Hours

九年级英语阅读理解困难题查看答案及解析

Every body likes to have a good time, but do you know that laughing is very good for your health? Scientists believe that laughing can help your body fight illness. Because of this, an Indian doctor opened the first laughter club in 1995.

Now there are more than 1,000 laughter clubs around the world. A laughter club is a place where you can go to laugh in your way for happiness and good health. Steve Wilson, the man who took laughter clubs to America, said, “We laugh with each other, but never at each other. At first, the laughter exercise feels a bit false. But soon the laughter becomes real. ”

Laughter is very important when we communicate with other people. It helps us make friends and understand each other better. We can laugh with people all over the world. It is the same in any language. So never be afraid to laugh. It’s good for your health.

Fill in the blanks according to the passage. Only one word for each blank.

Laughing can make us happy and 1.　　　 .The first laughter club2.　　　 opened in 1995. Now there are 3.　　　 1,000 laughter clubs all over the world. We can go to a laughter club to laugh for our health, but remember 4.　　　 to laugh at each other. Laughter is an international language. It is 5.　　　 to each other’s understanding. Let’s laugh with people around us.

九年级英语阅读理解中等难度题查看答案及解析

Every body likes to have a good time, but do you know that laughing is very good for your health? Scientists believe that laughing can help your body fight illness．Because of this, an Indian doctor opened the first laughter club in 1995．

Now there are more than 1,000 laughter clubs around the world．A laughter club is a place where you can go to laugh in your way for happiness and good health．Steve Wilson, the man who took laughter clubs to America, said, “We laugh with each other, but never at each other．At first, the laughter exercise feels a bit false．But soon the laughter becomes real．”

Laughter is very important when we communicate with other people．It helps us make friends and understand each other better．We can laugh with people all over the world．It is the same in any language．So never be afraid to laugh．It’s good for your health．

Fill in the blanks according to the passage．Only one word for each blank．

Laughing can make us happy and 1.．The first laughter club 2. opened in 1995．Now there are 3. 1,000 laughter clubs all over the world．We can go to a laughter club to laugh for our health, but remember4.to laugh at each other．Laughter is an international language．It is 5.to each other’s understanding．Let’s laugh with people around us．

九年级英语短文填空困难题查看答案及解析

The health care system (医疗体系) of a country is very important and different countries have different ways of paying for it.

Britain has a free health care system paid for by the government. It was the first country in the world to do so. Health care is free for everyone living in Britain. Most doctors and nurses work for the government and most hospitals are owned by the government. Until recently this system was very successful but lately there have been problems. The government has not put enough money into the health service. That’s why more people are using private health insurance (保险). They see doctors who work for themselves and pay the doctors through the health insurance company.

____3____ Most Americans have private health insurance. Doctors work for themselves and hospitals are privately owned. The health insurance company pays the doctors and the hospitals. The problem with this system is that poor people don’t have the money to pay for private health insurance. As a result, they often have both money and health problems.

Canada and New Zealand have a different system again. Health care is free. Doctors work privately and hospitals are privately owned. When you become ill, medical cost is paid for by the government.

1.________ first had free health care in the world.

A.Britain B.America C.Canada D.New Zealand

2.More British are using private health insurance because ________.

A.health care is free for everyone living in Britain

B.most hospitals are owned by the government

C.the government hasn’t put enough money into the health service

D.they can only see doctors who work for themselves

3.Which of the following can be the missing part in Para. 3?

A.America has a much worse system. B.Americans are satisfied with their system.

C.In America the system is very similar. D.In America the system is very different.

4.The underlined word “they” in Para.3 refers to (指的是) people ________.

A.who have private health insurance B.who see doctors working for themselves

C.who work for insurance companies D.who can’t afford private health insurance

九年级英语阅读单选困难题查看答案及解析