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[单选题]

They have planted（）trees in SaiBei, It's a "Great Green Wall" of trees.

A.million

B.millions

C.several

D.millions of

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更多“They have planted（）trees in Sa…”相关的问题

第1题

These apple trees, ______I planted three years ago, have not borne any fruit.A．thatB．whatC

These apple trees, ______I planted three years ago, have not borne any fruit.

A．that

B．what

C．which

D．when

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第2题

My wife and I moved into our home nine years ago. We have a yard and a "rock garden&q

uot;. Therethe rocks appear to be just thrown up onto the dirt as if someone were in a hurry, to finish. Very oftenwhen we have more flowers, Denise or I would plant them between the rocks,just to add some colorto the area.

Last summer I found, in the rock garden, a tiny little plant that I could not immediatelyrecognize. I knew I didn&39; t plant it and Denise said she didn&39; t either. We decided to let it continuegrowing until we could find out what it was.

Weeks passed and as I made my way back to the strange plant, it appeared to&39;be a sunflower. Itlooked thin and tall with only one head on it. I decided to baby it along and weed(除草) around it.As I pulled rocks from the area to get to the weeds, I noticed something unusual. The sunflower hadnot started where I saw it begin. It actually had begun under a big rock and grown under and around it to reach the sun.

If a tiny little sunflower didn&39; t let a big rock stand in its way of developing, we too have theability to do the same thing. If we believe in ourselves like that little sunflower, we can reach wherewe aim to go and get what we need for growth.

We need to believe in ourselves knowing we have the ability to achieve our goals. Like thesunflower, it knew it had the ability to get over the rocks because it had faith in itself that it wouldsucceed. Stand tall like the sunflower and be proud of who and what we are,then other things will beginto support us. We will find a way to go under or around any "rocks" in order to realize our goals.

Why did the family plant flowers in the "rock garden"？

A.To attract visitors.

B.To remove the rocks.

C.To please their neighbors.

D.To make the area colorful.

The author let the tiny plant continue growingA.to see how long it could live

B.to see how big it could grow

C.to find out what it actually was

D.to know if his wife had planted it

Why did the author think the sunflower was unusual？A.It was very thin and tall.

B.It had only one head on it.

C.It grew on top of a big rock.

D.It began to grow under a rock.

What does the author want to say through the story？A.Rocks cannot prevent us from success.

B.Sunflowers are able to grow everywhere.

C.We should take good care of the rock gardens.

D.We can get over difficulties if we trust ourselves.

请帮忙给出每个问题的正确答案和分析，谢谢！

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第3题

Sleep is a funny thing. We're taught that we should get seven or eight hours a night, but

a lot of us get by just fine on less, and some of us actually sleep too much. A study out of the University of Buffalo reported that people who routinely sleep more than eight hours a day and are still tired are nearly three times as likely to die of stroke--probably as a result of an underlying disorder that keeps them from sleeping soundly.

Doctors have their own special sleep problems. Residents are famously short of sleep. It is not unusual for. them to work 40 hours in a row without rest. They are not in the least worried about it, confident they can still deliver the highest quality of medical care. But an article in the Journal of the American Medical Association points out that in the morning after 24 hours of sleeplessness, a person' s motor performance is comparable to that of someone who is drunk. Curiously, surgeons who believe that operating under the influence of alcohol is grounds for sacking often don' t think twice about operating without enough sleep.

"I could tell you horror stories," says Jaya Agrawal, president of the American Medical Student Association, which runs a website for residents. Some are terrifying." I was operating after being up for over 36 hours," one writes. "I literally fell asleep standing up and nearly planted my face into the wound."

"Practically every surgical resident I know has fallen asleep at the wheel driving home from work," writes another. "I know of three who have hit parked cars. Another hit a 'Jersey gate' on the New Jersey Expressway, going 105kin/h."

"Your own patients have become the enemy," writes a third, because they are "the one thing that stands between you and a few hours of sleep."

The U.S. controls the hours of pilots and truck drivers. But until such a system is in place for doctors, patients are on their own. If you're worded about the people treating you or a loved one, you should feel free to ask how many hours of sleep they have had and if more rested staffers are available.

Sleep is a funny thing because ______.

A．the longer one sleeps, the less sound sleep he gets

B．the more sleep one gets, the more likely a stroke occurs

C．many people stick to about eight hours of sleep to stay fine

D．many people who sleep six hours a night still feel energetic in the day

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第4题

Prehistoric men and women enjoyed a more varied diet than people do now, since they ate

species of plant and several hundreds thousands types of living things. But only a tiny percentage of these were ever domesticated. Modern shops have hastened a trend towards specialization which began in the earliest days of agriculture. The food of the rich countries has become cheaper relative to wages. It is speedily distributed in supermarkets. But the choice annually becomes less and less great. Even individual foods themselves become more standardized. We live in the world of carrot specially blunted in order to avoid making a hole in the bag, and the tomato grown to meet a demand for a standard weight of weighting tomatoes to a kilo. Siri von Reis asks: "Only the three major cereals （谷物类食物） and perhaps ten other widely cultivated species stand between famine and survival for the world's human population and a handful of drug plants has served Western civilization for several thousand years. A rather obvious question arises: Are we missing something？" After all, there are 800 000 species of plant on earth.

1.In prehistoric times people（）.

A、ate much more than we do today

B、lived mainly on plant food

C、had a wide-ranging diet

D、were more fussy about what they ate

2.The specialization of food was started by（）.

A、the emergence of supermarkets

B、the rise of agriculture

C、the rich countries

D、the modern shops

3.According to the passage, people in the West today survive on（）.

A、carrots and tomatoes

B、several thousand types of plants and cereals

C、a very small number of cultivated foods

D、special species planted one thousand years ago

4.The conclusion seems to be that we（）.

A、could make use of more natural species

B、don't cultivate the right kind of food

C、produce more food than we need

D、cultivate too many different species

5.Most of us have come to expect（）.

A、no variation in our diet

B、a reduction in food supplies

C、a specialist diet

D、food conforming to a set standard

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第5题

I was eleven when we had to move out of the big old house in which I had spent my whole li

fe. Each time I thought of that, I felt very sad. When the final day came, I ran to a corner and sat alone, trying not to let others see my tears. Suddenly I felt a hand patting me on the shoulder. I looked up, and saw my grandpa. "It isn't easy, is it, my grandson？" he said in a very low voice, sitting down beside me. I nodded through my tears, without a word. We sat silently for a long time. Then he said, "Good-by is such a sad word that it seems too cold for us to use. We must try to avoid it."

Then we walked slowly in the garden, hand in hand, to have a last look at each rock, each tree, each flower. We sat for a while by the small pond which was a favorite place of my grandpa's. "What do you see here, Tommy？" asked the old man. I looked at the water, not knowing what to say, and then replied, "I see something soft and beautiful, Grandpa." He pulled me close to him and said, "It isn't the pond or the trees or the flowers that are beautiful. It is the special place in your heart that makes you feel so." After a while, he continued, "I built the pond, and planted the trees and the flowers a long time ago. I started to build this beautiful home the day my only son was born." He stopped. After a long silence, he murmured(低声说), "One day a terrible war came, and my son, like many other people's sons, went away to fight. Five months later, a telegram came, telling us that my son had passed away...' he couldn't finish his sentence. I saw tears trickle from his eyes. "That afternoon I picked some roses from this place and put them in front of son's portrait (肖像), and said goodbye to him. You know who he was, Tommy？"

"My father？" I asked in a whisper, hoping my grandpa would say no. But he said, "That's rights my dear. ' Ann in arm, we cried. Then the old man held me ups and said softly, "My dear Tom, we axe going to move, but don't say good-bye to our old house, never."

Tom and his grandpa______ the old house.

A．were too sorry to leave

B．were both unwilling to say goodbye to

C．felt sorry when they were in

D．didn't know that they had to leave

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第6题

A．plantedB．would plantC．were being plantedD．had been planted

A．planted

B．would plant

C．were being planted

D．had been planted