Researchers are now conducting hibernation experiment and can use chemicals to put living cells into sleep-like state they don’t age.A. for which B. that C. where D. which 题目和参考答案——青夏教育精英家教网—

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Researchers are now conducting hibernation experiment and can use chemicals to put living cells into sleep-like state_____ they don’t age.

A. for which B. that C. where D. which

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It feels like every time my mother and I start to have a conversation, it turns into an argument. We talk about something as simple as dinner plans and suddenly, my mother will push the conversation into World War 3. She’ll talk about my lack of bright future because I don’t plan to be a doctor. And much to her disappointment, I don’t want to do any job related to science, either. In fact, when I was pushed to say that I planned to major(主修) in English and communications, she nearly had a heart attack.

“Why can’t you be like my co-worker’s son?” she bemoans (哀叹) all the time. Her coworker’s son received a four-year scholarship and is now earning 70,000 dollars a year as an engineer. I don’t know what to answer except that I simply can’t be like Mr. Perfect as I’ve called the unnamed co-worker’s son. I can’t be like him. I am the type of the person who loved to help out in the community, write until the sun goes down, and most of all, wants to achieve a career because I love it, not because of a fame or salary.

I understand why my mother is worried about my future major. I’ve seen my mother struggle to raise me on her small salary and work long hours. She leaves the house around 6:30 am and usually comes home around 5 pm or even 6pm. However, I want her to know that by becoming a doctor, it doesn’t mean I’ll be successful. I’d rather follow my dreams and create my own future.

1.Which of the following topics do the writer and his mother often talk about?

A. the writer’s studies B. the writer’s future job

C. dinner plans D. wars around the world

2. We can infer from Paragraph 1 that the writer’s mother _____.

A. doesn’t want the writer to major English

B. doesn’t think the writer should be a doctor

C. gets along very well with the writer

D. doesn’t think working in the scientific field is a good idea

3.Which of the following statements is probably TRUE about the writer?

A. He wants to be like his mother’s co-worker’s son.

B. He wants to find a job in his community in the future.

C. He doesn’t think his mother’s co-worker’s son is perfect.

D. He wants to do something he really likes in the future.

Today, many species of animals and plants are endangered. This means they are in danger of becoming extinct and living on only in the pages of history books. The famous dodo is a classic example of a creature that became extinct. A flightless bird that lived on the island of Mauritius, it was discovered by sailors in 1598 but was hunted to extinction by 1681.

Hunting has caused the Bengal tiger and the African elephant to be endangered today but habitat destruction can also lead to extinction. This is equally true for plants. Animals and plants disappear for other reasons too, but the main cause is often a disruption（打乱，破坏） in the natural food chain, whether due to hunting, habitat destruction, or even the introduction of alien species.

The natural food chain is the cycle that governs the existence of all life on this planet. It is a carefully balanced cycle and any imbalance that occurs can cause knock-on effects that have serious consequences. At the beginning of the natural food chain are plants which turn sunlight into energy and draw nutrients from the earth. Plants are called producers.

After the producers come the consumers. There are three tiers of consumers. First are creatures such as plant-eating animals, fish and insects which feed off the producers. These animals that only eat plants are called herbivores. The second tier of consumers are carnivores - animals that live off other animals. The third tier of consumers eats both other animals and plants. These consumers, including most humans, are called omnivores.

After animals and plants die, they become food for other smaller creatures, such as bacteria and some plants, such as fungi. As they feed, these creatures turn the dead bodies back into gases and minerals which are again food for the producers at the beginning of the food chain. And so the cycle continues.

All of nature is connected and governed by hundreds of these delicate food chains and if a single plant in the chain cannot survive, then the insects that live off the plant start to die and the animals that eat the insects also start to die.

When a food chain is disrupted, the consequences can be extremely serious. One estimate suggests that for each plant species that is lost, up to 30 animals and insects may also die out. One wonders how many species were affected by the extinction of the dodo?

Humans can have disastrous effects on food chains. We've already mentioned hunting but now let's look at travel. When people first started to explore the world they took plant and animal species from their home countries and introduced them wherever they went. They didn't realize that by introducing alien species they were disrupting the natural food chains of the areas they discovered. Although there are strict rules in place today controlling the import and export of alien species, some places are still fighting the effects of aliens introduced hundreds of years ago.

For example, Gough Island in the South Atlantic Ocean is a breeding ground for albatrosses that have been nesting there for centuries. But in the 19th century, mice from passing ships were brought to the island. Being a species alien to the island, they had no natural predators and have now grown to such a size that they are attacking and killing albatross chicks. If they are allowed to continue, they will wipe out the albatross population.

With import laws and people's rising awareness of how humans affect the natural environment, hopefully we can learn to fit better into the natural food chains that govern our world. Otherwise we need to accept that the loss of any more plants and animals could eventually mean our own extinction.

1.What do the first two paragraphs mainly tell us?

A. Hunting and habitat destruction lead to extinction.

B. Many species of animals and plants are endangered.

C. Plants and animals become extinct for the same reasons.

D. The main cause of extinction is often a disruption in the natural food chain.

2.Which of the following sentence is TRUE according to the passage?

A. Strict rules alone can remove the bad effects of alien species.

B. Plants, herbivores and carnivores are the three tiers of consumers.

C. If a bird becomes extinct, the relevant food chain will be disrupted.

D. Animals and plants become extinct because alien species are imported.

3.By mentioning the mice in Gough Island, the author intends to highlight ______.

A. mice worldwide are growing all the time

B. being aliens, they had no natural predators

C. some places are still fighting the effects of aliens

D. traveling can have disastrous effects on food chains

4.What is the best title of the passage?

A. Survival of the fittest.

B. Endangered animals and plants.

C. How to protect the natural environment.

D. The link between food chains and extinction.

---- I’ve had a bad cough recently.

----Me too. I’ve never experienced ______ of air pollution in cities before.

A. an acute problem B. a more acute problem

C. a most acute problem D. the most acute problem

A proposal has been put forward at a recent video conference _____ measures be taken to raise the citizens’ awareness of traffic safety.

A. that B. as C. when D. which

Tech-free tourism refers to traveling without a mobile phone or similar devices, particularly to places_____ block or cannot access Internet and cellular signals.

A. which B. where C. when D. who

阅读下面材料，在空白处填入适当的内容（每空一词）或括号内单词的正确形式。

My name is Wil Wheaton --- and I am a nerd(怪人). It’s awesome to be 1. nerd. When I was a little boy, people really teased me about that and 2. (make) me feel like there was something wrong with me for loving strange things. Now that I’m an adult, I’m a3. (profession) nerd, and the world has changed. I think we 4. (realize) that being a nerd is not about what you love 5. about how you love.

So there’s going to be a thing in your life that you love. I don’t know what it’s going to be. It might be sports or science or reading or 6. (tell) stories --- it doesn’t matter what it is. Some of us love Game of Thrones, while others love Star Wars. But we all love those things so much that we travel 7. (thousand) of miles --- which is 8. (probable) easy for you, but we’re still using fossil fuels, so it’s difficult--- to be around people who love the things that we love the way that we love them. That’s 9. being a nerd is awesome.

I want you to work hard because everything worth 10. (do) is hard. I want you to be awesome, and I will do my very best to leave you a planet that you can still live on.

阅读下面材料，在空白处填上适当的内容（一个单词）或括号内单词的正确形式。将答案写在答题卡的相应位置。

We high school students do have some growing pains, but we can get rid of them1._____(correct) and wisely. First, some of us are upset about our body style and looks. It’s unnecessary and it’s not important at all. We needn’t care about it. It is one’s inner beauty that2.______ (matter). Second, we sometimes seem to be misunderstood by our teachers, parents and classmates. Faced with this, we can find a proper time to have a heart-to-heart talk with them, trying to remove the misunderstanding. Some of us have fewer friends, I think being open-minded and friendly will do us good. Third, we may fall behind others, 3.________ makes us stressed. Actually we can encourage4._______ to work efficiently, full of5._______(determine). At last, some of us don’t have much pocket money, so they feel unhappy. Isn’t it strange? So long as we have some, that’s enough. And we can learn how to spend money.

A I was very disappointed not to be able to go to the jazz concert last Friday．The advertisement in the paper said that you could buy tickets at the theatre box in Richland Hills any day between 10:00 and 4:00．Since I work from 9:00 to 5:30, the only time I could go to the theatre was during my 45-minute lunch break．

Unfortunately, the theatre is on the other side of the town, and the bus service between my office and Richland Hills is not very good．But if you are lucky, you can make the round trip in 45 minutes．Last Monday．I stood at the bus stop for 15 minutes waiting for the bus, By the time I saw one come around the corner, there was not enough time left to make the trip．

So I gave up and went back to the office．The same thing happened on Tuesday, and again next day．On Thursday, my luck changed．I got on a bus right away and arrived at the theatre in exactly 20 minutes．When I got there, however, I found a long line of people at the box office, I heard one man say he had been waiting in line for over an hour．Realizing I would not have enough time to wait in line．I caught the next bus and headed back across the town．

By Friday I realized my only hope was to make the trip by taxi, it was expensive, but I felt it would be worth it to hear the concert．The trip by taxi only took 10 minutes, but felt like an hour to me．When I got to the theatre, I was relieved to see that nobody was waiting in line．The reason, however, I quickly discovered, was that they had already sold all the tickets．

1.The man learned that there would be a concert last Friday．

A．from the newspaper

B．from his friends

C．from one of his work-mates

D．over the radio

2.He tried to go to the theatre every day but managed to get there only _______．

A．once

B．three times

C．twice

D．four times

3.One day the man took _______ to get to the theatre by bus．

A．forty-five minutes

B．fifteen minutes

C．over an hour

D．just twenty minutes

4.The underlined word “relieved” may best be replaced by ___________．

A．surprised

B．puzzled

C．pleased

D．sorry

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