-The dustbins for three weeks． -In fact, they once a week． [ ] A． haven't emptied; should have been emptied B． haven't been emptied; should be emptied C． haven't been emptied; should have emptied 题目和参考答案——青夏教育精英家教网—

题目内容

－The dustbins ________ for three weeks．

－In fact, they ________ once a week．

[　　]

A．

haven't emptied; should have been emptied

B．

haven't been emptied; should be emptied

C．

haven't been emptied; should have emptied

D．

haven't emptied; should have emptied

答案：B
解析：

根据句意，第一个空应该用现在完成时态的被动语态；第二个空为情态动词的被动语态。

练习册系列答案

68所名校图书小升初高分夺冠真卷系列答案

伴你成长周周练月月测系列答案

小升初金卷导练系列答案

相关题目

I was cleaning out an old box when an old card caught my eye：Queen City Casket Company．“What is it?” I wondered．I 　36　 it over．There，in faded ink, was a hand-scrawled(手写的) 　37　. Immediately my mind traveled 38   many years．
I was nine years old, walking down the cold，wet streets of Springfield，with a bag of magazines on my shoulder．On my   39 that day．I came to that Company finally, whose owner, Mr. Rader，had always taken me there to ask his workers 40 they wanted any magazines．
Shaking off the 41 like a wet dog．I entered Mr. Rader's office．After a quick glance ,he 42 me over to the fire-place．Noticing the 43   in the top of my 44  ，he said，“Come with me!”，pulling me into his pickup 45 ．we pulled to a stop before a shoe store．Inside，a salesman 46   me with the finest pair of Oxfords I had 47 seen．I 48 about 10 feet tall when I got up 49 them．“We’d like a pair of new socks too．” Mr Rader said．
Back in his office, Mr Rader took out a 50  ，wrote something on it, and handed it to me．With   51 eyes，I read，“Do to others as you would have them do to you．” He said affectionately(深情地)，“Jimmy，I want you to　52　　I love you”．
I said good-bye, and for the first time I 53    a flicker of hope that somehow things would be 54 ．With people like Mr Rader in the world，there was hope，kindness and love，and that would always make a   55 ．

One day a farmer’s donkey fell down into a well. The animal cried ___1___ for hours as the farmer tried to think out ___2___ to do. Finally, he decided the animal was ___3___, and the well needed to be ___4___ up anyway; it just wasn’t ___5___ it to save the donkey. He invited all his ___6___ to come over and help him. They all grabbed（握起）a shovel（铁锹）and began to shovel ___7___ into the well. At first, the donkey ___8___ what was happening and cried horribly(惊恐的,害怕的). Then, to everyone’s ___9___ he quieted down.
A few shovel loads later, the farmer finally looked ___10___ the well. He was surprised at what he saw. With each shovel of dirt that hit his back, the donkey was doing something amazing. As the farmer’s neighbours ___11___to shovel dirt on top of the animal, he would ___12__ it off and take a step up. Pretty soon, everyone was amazed as the donkey stepped up over the edge of the well and happily ran off!
Life is going to shovel dirt on you, all kinds of dirt. If you want to get out of the well, the ___13___ is to shake it off and take a step up. Each of our troubles is a stepping stone（垫脚石）. We can get out of the ___14___ wells just by not stopping, never ___15___! Shake it off and take a step up.

London: What could possibly he wrong with planting trees? The benefits are obvious: they firm the soil, absorb extra water and take carbon dioxide out of the atmosphere.
However, it now turns out that planting trees could add to global warming. Tree roots do a great job of keeping soil firmly on the ground and out of the wind's power. The problem is that some of those dust clouds play an important part in taking in carbon dioxide.
Huge dust storms blow out over the oceans from dry parts of North Africa and central Asia. Tons of dust are lifted and left as a thin film over the ocean surface.
Dust from China is carried east and left in the Pacific Ocean. If a tree-planting program there is successful and the dust supply reduced, the final result may be that less carbon dioxide gets locked away in the ocean.
Andy Ridgwell, an environmental scientist from the University of East Anglia, has spent the past few years studying dust and says his work shows clearly the complexity of the system and the importance of not working uselessly with it without understanding the results. For this reason the need is to focus on cutting carbon dioxide giving off rather than dealing with the land surface aimlessly.
An American scientist, Robert Jackson, has shown that when native grassland areas are occupied by trees, carbon is lost from the soil. "We are studying why the soil carbon disappears, but one theory is that trees do a lot more of their growing above ground compared to grasses, so less carbon goes directly into the soil from trees. " said Jackson.
In wet areas of the world, the gain from trees absorbing carbon dioxide above ground seems to be outweighed by the loss of carbon from the soil below ground.
Countries that plan to combat global warming by planting trees may have to think again. Solutions to environmental problems are often more complex than they first appear, and understanding the Earth's climate is a very great challenge.
64. People usually hold the opinion that _______.
A. huge dust storms can destroy carbon dioxide
B. huge dust storms can destroy the oceans on the earth
C. planting trees could reduce global warming
D. planting trees is the only way to control huge dust storms
65. Andy Ridgwell, the environmental scientist, believes that _______.
A. environmental problems are more complex than expected
B. trees shouldn't have been planted in dry places
C. dust plays a more important part than trees
D. carbon dioxide is harmful to everything
66. Robert Jackson's experiment proves that _______.
A. carbon can turn grass into dust
B. trees hold more carbon than grass
C. less carbon can make trees grow faster
D. grassland areas should be covered by forests
67. The underlined word "combat" in the last paragraph means _______.
A. learn about B. give up C. live with D. fight against

Can storms in Africa cause asthma(哮喘) in the Caribbean(加勒比)? Islanders point to the desert insects that land on beaches after a 5,000-kilometer flight across the Atlantic. If they can use winds to get from one continent to another, so can clouds of dust that carry disease.
Scientists think that as Africa becomes drier, dust from expanding deserts is being blown away into Caribbean islands. A study in Barbados shows that asthma has increased 17 times since Africa’s drought(干旱) began in 1973.
Other forms of life are suffering, too. Among them are the Caribbean’s famous coral reefs( 珊瑚礁), which began dying in large numbers in the 1900s. Eugene Shinn of the U.S. Geiological Sudrvey(USGS) in Florida went to the virgin Islands to study the reefs. The tests he and his colleagues carried out showed that the coral was dying of disease caused by Africa microbes(微生物) from across the ocean.
William Sprigg of the University of Arizona is studying the problem as part of a major UN project. He says that dust is causing problems in the U.S., too.
“We are just beginning to collect the evidence of airborne(空气传播的) dust influences on human health,” he told The Washington Post.
【小题1】Which of the following can be the best title for this passage?

A．Dangerous Dust	B．Dangerous Disease
C．Changing Weather	D．Developing Technology

【小题2】 Where does the dust talked about in this passage come from?

【小题3】 The increase of asthma in the Caribean is probably related to _____ according to scientists.

【小题4】Which of the following is NOT true about the Caribbean coral reefs?

A．They are in Florida.

B．They used to be very beautiful.

C．They began dying in the past decades.

D．The African microbes have bad effect on them.

【小题5】 Which of the following is TRUE about William Sprigg?

A．He is a member of UN.

B．He thinks African dust also affects the US.

C．He has collected enough evidence about dust influences.

D．He is a reporter from The Washington Post.

At the end of eight grade, our class went to Washington, D.C. For a group of 14-year-olds, this was a big deal!
The first day was so tiring; we could hardly remember where we were and what we were seeing. The next morning, we were off to see monuments (纪念碑)，starting with Washington, Lincoln and Jefferson. We walked along the paths through trees. Then the Wall came into view—the Vietnam Veterans Memorial.
As I moved slowly closer to the Wall, I heard a bagpipe（风笛）in the distance, which seemed to show respect to the lives lost in the jungles of Vietnam .
We continued walking and felt surprised at the number of names carved in the black stone. I was determined to find a soldier with my last name, but my hunt was stopped when a man caught my eyes. He was kneeling(跪着) at the Wall, a single rose at his feet. His head was bowed and he was rubbing his fingers over one name. I thought how sad he was, and then moved on .
After a few minutes I found one with my last name, but my eyes returned to the kneeling man. He was still rubbing his fingers over the same name. He never knew I was watching him, lost in deep sorrow. It was time for me to leave the kneeling man and the Wall. On the way home, I couldn’t help thinking of the kneeling man and his sad face. I wasn’t sure of the effects of war before, but at that moment I realized how much that man suffered from losing his loved one. Maybe he was the only one of so many families who experienced the same .
I never knew the full effects of war until I saw that man. I only know about war from history classes. The kneeling man taught me more about war and the effects it has on people than any history book .
【小题1】Which of the following makes the author feel the suffering that war brings to human beings?

A．The kneeling man.	B．The sound of a bagpipe.
C．The number of names carved in the stone.	D．The jungles of Vietnam.

【小题2】The man continued to rub his fingers over the name probably because_____.

A．he found it covered with dust	B．he missed the loved one who died in a war
C．he intended to remove it completely	D．he recalled the fierce war he fought in

【小题3】What did the author learn from the trip?

A．How fierce war is in history.	B．How people remember those who died in wars.
C．What bad effects war had on many families.	D．What we should do to prevent war.

【小题4】According to the last paragraph, the author probably thinks that _____.

A．he should have studied history hard in class

B．history books don’t tell readers the truth

C．there is more in history than books tell us

D．the kneeling man should be a history teacher

试题分类