After cutting down the tree, they _____ a lit...

After cutting down the tree, they _____ a little boat out of it．

高三英语单项填空中等难度题查看答案及解析

They have       the water supplies of the city.

A. cut off         B. cut out         C. cut down       D. cut in

高三英语单项填空中等难度题查看答案及解析

I am so worried about global warming. We need stop cutting down all of the trees so that they can absorb the carbon dioxide. I think the Kyoto Protocol （京都议定书） to stop pollution is a great idea ,and I hope our country will decide to follow it, too.

— Eli S.,10,Texa

People should do all they can to help stop pollution, even if it is something as little as recycling your soda can. Every little thing helps. Maybe schools can put recycling bins in classrooms. Students can bring in all of their cans and bottles and see how many the school can collect.

— Lindsey A.,11, Massachusett

The United States should take action to help stop pollution. Since we are one of the richest countries, we should at least spend a little money to help.

— Aaron z,11,Massachusett

It is not good that the United States is not following the Kyoto Protocol. The U.S. is one of the most pollution emitting （污染物排放）countries in the world. Even if the rest of the world agrees to follow those rules, without the U. S. and its big businesses agreeing, global warming will still be a big problem.

—Augustine S.,11,Ohio

The world needs to learn more about global warming problems. If we do not do something soon then some of Earth’s coolest animals will become extinct. People should use solar power instead of things that pollute the atmosphere!

— Jillian J.,10,Pennsylvania

Global warming is very dangerous, and it must be prevented. Even if people think that it cannot be stopped ,we should  at least try. Stopping global warming is more important than keeping our businesses going. What about the penguins（企鹅）and the polar bears? We can’t just let them become extinct.

—Samantha R.,11,Illinois

72．Why does Lindsey suggest schools put recycling bins in classrooms?

A．To keep the classroom clean            B. To help protect wild animals.

C．To help protect our earth.            D. To collect waste in classroom.

73．Augustine worries that global warming problems will be difficult to solve because       .

A．many people think that global warming cannot be stopped

B．more and more trees are being cut down

C．American government spends little money stopping pollution

D．the U.S. refuses to follow the Kyoto Protocol

74．Jillian and Samantha believe that      .

A．solar power is earth-friendly energy

B．global warming threatens animals’ survival

C．America is the richest country in the world

D．the penguins and the polar bears are dying out

75．What do the six children mainly talk about?

A．Environmental problems.    B．The Kyoto Protocol.

C．Animal protection.                       D．The climate change.

高三英语阅读理解简单题查看答案及解析

Their water supply has been_______ because of the earthquake.

高三英语单项填空简单题查看答案及解析

Whenever human populations have lived in forest areas, they have always cut down trees which they used for a number of purposes, for housing and ships and served as a source of heating fuel and timber. Growth of cities often meant expansion into forest areas, while even more trees were removed to provide space for agriculture. With the growing demand for paper, vast quantities of trees have also been cut down for paper production. These factors, along with many others, have been contributing to a dangerous phenomenon known as deforestation.

In the last 5,000 years, humans have reduced forest from roughly 50 percent of the earth’s land surface to less than 20 percent. Most of this original, or old growth, forest cover is concentrated in three large areas: the Canadian and Alaskan boreal forest, the boreal forest of Russia, and the tropical forest of the northwestern Amazon Basin and the Guyana Shield. These areas comprise almost 70 percent of the world’s remaining original forest cover. In most places, the rate of deforestation is increasing, with the alarming result of 16 million hectares disappearing worldwide every year.

Loss of forest does not just mean the decline of natural resources. There are several other factors that make deforestation seriously harmful to both the human and natural worlds. One of them is changes in the global climate. For example, forest clearance is releasing substantial volumes of carbon dioxide (CO₂) into the atmosphere as vegetation is burnt or decays. It has been suggested that this is a significant factor in global warming. Moreover, about 10 percent of the world’s tree species are in danger of extinction as a result of deforestation. Deforestation also threatens biological diversity through the destruction of wildlife habitats, which endangers a number of animal species and leads to their potential disappearance. Species are particularly easy to extinction in tropical rainforests because many species have few individuals per unit area, which makes reproduction more difficult. Finally, since forests play an important role in storing water and stabilizing soil, deforestation and the resulting change in land use cause soil erosion (腐蚀) and other forms of land degradation.

1.The passage discusses all of the following EXCEPT the ________.

A. causes of deforestation              B. consequences of deforestation

C. management of deforestation          D. rate of deforestation

2.  The word “diversity” in the last paragraph probably means “________”.

A. variety                              B. expansion

C. development                      D. advantage

3.Why does the author mention fuel and timber in Paragraph 1?

A. To explain the rate of deforestation.

B. To compare them with housing and ships.

C. To show the dangers of deforestation.

D. To illustrate the causes of deforestation.

4.Which of the following sentences summarizes Paragraph 3 best?

A. Deforestation threatens biological diversity.

B. Deforestation has many harmful consequences.

C. Deforestation causes changes in global climate.

D. Deforestation should be stopped.

高三英语阅读理解简单题查看答案及解析

Most of the young girls know they should cut down on fat, but knowing such a thing isn’t of much help when it ______ shopping and eating.

A．refers to          B．comes to          C．speaks of          D．focuses on

高三英语单项填空简单题查看答案及解析

Gardeners may be able to cut down on the amount of weeds(杂草）killer they use by dealing with invaders at specific times of the day, such as dawn, a new study suggests.

Researchers at the University of Bristol have discovered that the 24-hour rhythms of plants leave them more defenseless to herbicides(除草剂) at different points in their daily 24 hour cycle.

They believe the findings could help farmers by reducing crop loss and improving harvests. And gardeners could benefit from knowing which weeds respond better at certain times of the day. In recent years, pesticides and herbicides have been implicated in the decline of important pollinating insects, such as bees.

Dr Antony Dodd，senior author of the new study，said: “The research suggests that, in future, we might be able to improve the use of some chemicals that are used in agriculture by taking advantage of the biological clock in plants.

Just like humans, plants have evolved to take advantage of cycles of night and day, with certain biological processes turning on at different times of the day.

Scientists have discovered that many drugs work much better in humans if they are given at specific hours. Aspirin, for example, has doubled the impact on thinning the blood if taken at night as opposed to in the morning. The process is known as ‘chronotherapy’ and researchers wanted to find out if the same concept could be applied to plants.

Many gardeners already know that plants drink in more water in the morning because their pores(气孔) are open to take advantage of early morning dew and water vapour. At the break of the day, plants are also not busy producing food throughphotosynthesis(光和作用）.The open pores could also be the reasons that chemicals are more effective at dawn and also at dusk.

The air is also likely to be stiller at dawn and dusk, meaning that pesticides or herbicides are less likely to be blown away to places where they are not wanted. Pesticide labels often warn against spraying on windy days in case they endanger people or animals. Many insects are active early in the morning and around dusk, also making very early morning and early evening effective times for insecticide.

Commenting on the study, Dr. Trevor Dines, Botanical Specialist at the conservation charity Plantlife, said: “This is fascinating research which will be of great interest to many gardeners like me. If anything used to think the opposite was true - that applying herbicides and pesticides late in the day would be better as they’d remain in Vet contact' with the plant for longer in the cool of the night and therefore be taken up or absorbed more effectively. This research knocks that assumption on its head”

1.Which of the following can replace the underlined phrase “implicated in” in the third paragraph?

A.restored to B.blamed for

C.limited to D.composed of

2.According to the research, what are the reasons for using herbicides in the morning?

A.The process of photosynthesis is most active in the morning.

B.Insects are more defenseless in the morning than any other time of the day.

C.Bigger pores on the plants make herbicides work more effectively.

D.The stronger morning wind blows pesticides away to more places.

3.What can be inferred from the last paragraph?

A.Gardeners were interested in combining science with gardening.

B.A long time had passed before herbicide was applied in farming.

C.The old assumption about the use of chemicals proved right.

D.Many gardeners used to spray herbicides at the wrong time.

4.What is the main idea of this article?

A.New chemicals have been found to help kill harmful insects.

B.Biological clock of plants could help gardeners use less weed killer.

C.Plants’ cycles can be taken advantage of to improve the environment.

D.The research on the effects of pesticides has enabled good harvests.

高三英语阅读理解困难题查看答案及解析

Seeing a stranger with a knife in his hand, the little girl stood under the tree, _______ out of       her mind.

高三英语单项填空中等难度题查看答案及解析

270. Hoping that they would ______ the rent a little, we pointed out all of the flaws in the apartment.

高三英语单项填空简单题查看答案及解析

The army has _____ grain. They are in a very difficult situation.

高三英语单项填空中等难度题查看答案及解析