Whether life will continue on the earth for m...

Whether life will continue on the earth for millions of years ______will depend on ____this problem can be solved.

A. to come; if       B. coming; if         C. to come; whether   D. coming; whether

高二英语单项填空简单题查看答案及解析

Whether life will continue on the earth will depend on _______ this problem can be solved.

A. that　　　 B. which　　 C. whether　 D. If

高二英语单项填空中等难度题查看答案及解析

Millions of years ago dinosaurs (恐龙) lived on the earth. In the days of dinosaurs the whole earth was warm and wet. There were green forests and they could find enough to eat. Later, parts of the earth became cold and dry. and the forests there died. Then dinosaurs could not find enough to cat. This must be one reason why dinosaurs died out.

We can guess another reason. New kinds of animals came on the earth. Some had big brains and were fast and strong. They could kill dinosaurs. There may be other reasons that we don’t know about yet. Scientists are trying to make more discoveries about dinosaurs.

Dinosaurs were of many sizes and shapes (形状).　 Some were as small as chickens, while some were about 90 feet long.

There were also terrible fights between dinosaurs. They might have happened more than 100 million years ago. Though there was no man to see any of the fights, we can be told by the animal’s footprints (足迹) that fight did take place.

1.According to the passage, dinosaurs did exist only ______on the earth.

A. for millions of years　　　　　　　　　　　　　

B. millions of years ago

C. more than 100 millions years ago　　　　　　

D. when it was warm and wet somewhere

2. One reason why dinosaurs died out is that______.

A. there were too many dinosaurs　　　　　　　　

B. parts of the earth became cold and dry

C. the dead forests there could not supply them with enough food

D. they couldn’t find enough to eat

3.. One more reason may be that ______.

A. new kinds of animals came on the earth

B. some fast and strong animals with big brains could kill them

C. some dinosaurs were as small as chickens　　　　

D. some big dinosaurs died in the fights

4.We can see from this passage ______.

A. scientists are trying to make some dinosaurs　　

B. dinosaurs are dangerous enough

C. dinosaurs are worth studying　　　　　　　　　　　

D. scientists know nothing about dinosaurs

高二英语单项填空中等难度题查看答案及解析

Millions of years ago dinosaurs (恐龙) lived on the earth. In the days of dinosaurs the whole earth was warm and wet. There were green forests and they could find enough to eat. Later, parts of the earth became cold and dry. and the forests there died. Then dinosaurs could not find enough to cat. This must be one reason why dinosaurs died out.

We can guess another reason. New kinds of animals came on the earth. Some had big brains and were fast and strong. They could kill dinosaurs. There may be other reasons that we don’t know about yet. Scientists are trying to make more discoveries about dinosaurs.

Dinosaurs were of many sizes and shapes (形状).　 Some were as small as chickens, while some were about 90 feet long.

There were also terrible fights between dinosaurs. They might have happened more than 100 million years ago. Though there was no man to see any of the fights, we can be told by the animal’s footprints (足迹) that fight did take place.

1. According to the passage, dinosaurs did exist only ______on the earth.

A. for millions of years

B. millions of years ago

C. more than 100 millions years ago

D. when it was warm and wet somewhere

2.　 One reason why dinosaurs died out is that______.

A. there were too many dinosaurs

B. parts of the earth became cold and dry

C. the dead forests there could not supply them with enough food

D. they couldn’t find enough to eat

3. . One more reason may be that ______.

A. new kinds of animals came on the earth

B. some fast and strong animals with big brains could kill them

C. some dinosaurs were as small as chickens

D. some big dinosaurs died in the fights

4. We can see from this passage ______.

A. scientists are trying to make some dinosaurs

B. dinosaurs are dangerous enough

C. dinosaurs are worth studying

D. scientists know nothing about dinosaurs

高二英语阅读理解中等难度题查看答案及解析

Is There Life on Earth?

There was great excitement on the planet of Venus(金星) this week. For the first time Venusian scientists managed to land a satellite on the planet Earth, and it has been sending back signals as well as photographs ever since.

The satellite was directed into an area known as Manhattan (named after the great Venusian astronomer Prof. Manhattan, who first discovered it with his telescope 20,000 light years ago).

Because of excellent weather conditions and extremely strong signals, Venusian

scientists were able to get valuable information as to feasibility (可行性) of a manned flying saucer (碟) landing on Earth. A press conference was held at the Venus Institute of Technology.

“We have come to the conclusion, based on last week’s satellite landing,” Prof. Zog said, “that there is no life on Earth.”

“How do you know this?” the science reporter of the Venus Evening Star asked.

“For one thing, Earth’s surface in the area of Manhattan is made up of solid concrete and nothing can grow there. For another, the atmosphere is filled with carbon monoxide (一氧化碳) and other deadly gases and nobody could possibly breathe the air and survive.”

“What does this mean as far as our flying saucer program is concerned?”

“We shall have to take our own oxygen with us, which means a much heavier flying saucer than originally planned.”

“Are there any other dangers that you discovered in your studies?”

“Take a look at this photo. You see this dark black cloud hovering(盘旋) over the surface of Earth? We call this the Consolidated Edison Belt. We don’t know what it is made of, but it could give us a lot of trouble and we shall have to make further tests before we send a Venus Being there.”

“Over here you will notice what seems to be a river, but the satellite findings indicate it is polluted and the water is unfit to drink. This means we shall have to carry our own water, which will add even greater weight to the saucer.”

“Sir, what are all those tiny black spots on the photographs?”

“We are not certain. They seem to be metal particles(粒子) that move along certain paths. They emit gases, make noise and keep crashing into each other. There are so many of these paths and so many metal particles that it is impossible to land a flying saucer without its being smashed by one”.

“What are those stalagmite(石笋) projections sticking up?”

“They are some of granite formations that give off light at night. Prof. Glom has named them skyscrapers since they seem to be scraping the skies. ”

“If all you say is true, won’t this set back the flying saucer program several years?”

“Yes, but we shall continue as soon as the Grubstart gives us the added funds.”

Prof. Zog, why are we spending billions and billions of zilches to land a flying saucer on Earth when there is no life there?

“Because if we Venusians can learn to breathe in an Earth atmosphere, then we can live anywhere.”

1.According to Prof. Zog, the Venusians will have to take their own oxygen with them when they carry out their flying saucer program because ________.

A. they need it on their way to the planet of earth

B. the earth’s atmosphere is filled with deadly gases

C. oxygen is far from enough in the area of Manhattan

D. there is no air on the planet of Earth

2.The “dark black cloud” in the 10th paragraph indicates ________.

A. the polluted air hovering over the surface of Earth

B. the mass of tiny drops of water floating above Earth

C. the mass of small things moving through the air

D. the dark clouds gathering before a storm breaks

3.The author wishes to call our attention to the fact that ________.

A. modern man has polluted his environment to such an extent that he may destroy himself if he carries on like this

B. there is no point in spending billions and billions of zilches to land a flying saucer on Earth

C. pollution has become so serious a problem on Earth that even Venusians find life there unbearable

D. it is difficult, if not altogether impossible, to land a manned flying saucer on Earth

4.The tone of this essay is ________.

A. hopeless and objective

B. serious and critical (批评的)

C. humorous and satirical (讽刺的)

D. sensitive and subjective

高二英语阅读理解中等难度题查看答案及解析

For years scientists have been worried about the effects of air pollution on the earth’s natural conditions. Some believe the air inside many houses may be more dangerous than the air outside. It may be one hundred times worse.

Indoor air pollution can cause a person to feel tired, to suffer eye pain, headache and other problems. Some pollutants（污染物）can cause breathing disorders, diseases of blood and even cancer. Most scientists agree that every modern house has some kind of indoor pollution.

People have paid more attention to the problem now. It is true that when builders began making houses and offices they did not waste energy. To do this they build buildings that limited the flow of air between inside and outside. They also began using man-made building materials. These materials are now known to let out harmful gases.

As the problem became more serious, scientists began searching for a way to deal with it. They discovered a natural pollution control system for building—green plants. Scientists do not really know how plants control air pollution. They believe that a plant’s leaves absorb（吸收）or take in the pollutants. In exchange the plant lets out oxygen through its leaves and tiny organizations on its roots. Scientists suggest that all buildings should have one large plant or several small plants inside for every nine square meters of space. Studies of different plants show that each absorbs different chemicals. So the most effective way to clean the air is to use different kinds of plants. Having green plants inside your house can make it a prettier and healthier place.

1.Generally speaking, indoor air pollution may be more harmful than the air outside because 　　　　 .

A．indoor air pollution can often make people seriously ill

B．man-made building materials give off dangerous gases

C．there may be more harmful gases outside the buildings

D．the air indoors is polluted, which is very harmful

2.Some kind of indoor pollution can be found in 　　　　 .

A．every modern house B．every old house

C．all kinds of houses 　　 D．all kinds of offices

3.The indoor air pollution is caused by 　　　　 .

A．the limit of the flow of air between inside and outside

B．the building way that the builders want to save energy

C．the building things that are made of man-made materials

D．the man-made building materials and the limit of air-flow

4.The reason why we should use different kinds of plants to clean the air is that

A．plants can let out all kinds of pollutants indoors

B．plants may take in more oxygen （氧气）which people need

C．plants can absorb all kinds of harmful indoor chemicals

D．plants can make our houses prettier and more healthy

高二英语阅读理解中等难度题查看答案及解析

For years scientists have been worrying about the effects of air pollution on the earth’s natural conditions. Some believe the air inside many houses may be more dangerous than the air outside. It may be one hundred times worse.

Indoor air pollution can cause a person to feel tired, to suffer eye pain, headache and other problems. Some pollutants can cause breathing disorders, diseases of blood and even cancer, Most scientists agree that every modern house has some kind of indoor pollution.

People have paid more attention to the problem now. It is true that when builders began making houses and offices they did not waste energy. To do this they built buildings that limited the flow of air between inside and outside. They also began using man-made building materials. These materials are now known to let out harmful gases.

As the problem became more serious, scientists began searching for a way to deal with it. They discovered a natural pollution control system for building—green plants. Scientists do not really know how plants control air pollution. They believe that a plant’s leaves absorb or take in the pollutants. In exchange the plant lets out oxygen through its leaves and through its tiny organizations on its roots. Scientists suggest that all buildings should have one large plant or several small plants inside for every nine square metres of space. Studies of different plants show that each absorbs different chemicals.

So the most effective way to clean the air is to use different kinds of plants. Having green plants inside your house can make it a prettier and more healthy place.

1.Generally speaking, indoor air pollution may be more harmful than the air outside because ________.

A．indoor air pollution can make a person seriously ill

B．man - made building materials give off dangerous gases

C．there may be more harmful gases outside the buildings

D．the air indoors is polluted, which is very harmful

2.Some kind of indoor pollution can be found in ________

A. every modern house

B. every old house

C. all kinds of houses

D all kinds of offices

3. The indoor air pollution is caused by ______

A. the limit of the flow of air between inside and outside

B. the building way that the builders want to save energy

C. the building things that are made of man-made materials

D. the man-made building materials and the limit of airflow

4.The reason why we should use different kinds of plants to clean the air is that _______

A. plants can let out all kinds of pollutants indoors

B. plants may take in more oxygen which people need

C. plants can absorb all kinds of harmful indoor chemicals

D. plants can make our houses prettier and more healthy

高二英语阅读理解中等难度题查看答案及解析

For years scientists have been worried about the effects of air pollution on the earth’s natural conditions. Some believe the air inside many houses may be more dangerous than the air outside. It may be one hundred times worse.

Indoor air pollution can cause a person to feel tired, to suffer eye pain, headache and other problems. Some pollutants can cause breathing disorders, diseases of blood and even cancer. Most scientists agree that every modern house has some kind of indoor pollution.

People have paid more attention to the problem now. It is true that when builders began making houses and offices they did not waste energy. To do this they build buildings that limited the flow of air between inside and outside. They also began using man-made building materials. These materials are now known to let out harmful gases.

As the problem became more serious, scientists began searching for a way to deal with it. They discovered a natural pollution control system for building—green plants. Scientists do not really know how plants control air pollution. They believe that a plant’s leaves absorb or take in the pollutants. In exchange the plant lets out oxygen through its leaves and tiny organizations on its roots. Scientists suggest that all buildings should have one large plant or several small plants inside for every nine square meters of space. Studies of different plants show that each absorbs different chemicals. So the most effective way to clean the air is to use different kinds of plants. Having green plants inside your house can make it a prettier and more healthy place.

1.Generally speaking, indoor air pollution may be more harmful than the air outside because ______.

A．indoor air pollution can often make people seriously ill

B．man-made building materials give off dangerous gases

C．there may be more harmful gases outside the buildings

D．the air indoors is polluted, which is very harmful

2.Some kind of indoor pollution can be found　in______．

Ａ．every modern house　         B．every old house

C．all kinds of houses           D．all kinds of offices

3.The indoor air pollution is caused by ______.

A．the limit of the flow of air between inside and outside

B．the building way that the builders want to save energy

C．the building things that are made of man-made materials

D．the man-made building materials and the limit of air-flow

4.The reason why we should use different kinds of plants to clean the air is that ______.

A．plants can let out all kinds of pollutants indoors

B．plants may take in more oxygen which people need

C．plants can absorb all kinds of harmful indoor chemicals

D．plants can make our houses prettier and more healthy

高二英语阅读理解中等难度题查看答案及解析

For years scientists have been worried about the effects of air pollution on the earth's natural conditions. Some believe the air inside many houses may be more dangerous than the air outside.

Most scientists agree that every modern house has some kind of indoor pollution. People began to notice the problem in the early 1970s. When builders began making houses and offices, they did not want to waste energy. To do this they built buildings that limited the flow of air between inside and outside. They also used man－made building materials which are now known to let out harmful gases.

As the problem became more serious, scientists began searching for a way to deal with it. They discovered a natural pollution control system for building green plants.

Scientists believe that a plant's leaves absorb the pollutants (污染物). In exchange the plant lets out oxygen through its leaves. Studies of different plants show that each absorbs different chemicals. So the most effective way to clean the air is to use different kinds of plants.

1.Indoor air pollution may be more dangerous than the air outside mainly because 　　　　 .

A. the building are too high

B. the flow of air indoor is limited

C. the building materials are harmful

D. people don't want to waste energy

2.Some kind of indoor pollution can be found in 　　　　 .

A. all kinds of offices B. all kinds of houses

C. every modern house 　 D. every old house

3.In the last paragraph the word“ absorb” may mean 　　　　 .

A. take in B. bring up C. give out D. turn into

4.Scientists believe that plants can　　　　 .

A. change oxygen into pollutants

B. absorb all the pollutants

C. make your houses more prettier

D. absorb pollutions and let out oxygen

5.According to the last paragraph, we should 　　　　 to clean the air.

A. plant all kinds of plant

B. plant more trees.

C. have the same kind of plant

D. have different kinds of plants

高二英语阅读理解中等难度题查看答案及解析

For hundreds of millions of years, turtles (海龟) have struggled out of the sea to lay their eggs on sandy beaches, long before there were nature documentaries to celebrate them, or GPS satellites and marine biologists to track them, or volunteers to hand-carry the hatchlings (幼龟) down to the water’s edge lest (for fear that) they become disoriented by headlights and crawl towards a motel parking lot instead. A formidable wall of bureaucracy has been erected to protect their prime nesting on the Atlantic coastlines. With all that attention paid to them, you’d think these creatures would at least have the gratitude not to go extinct (die out).

But Nature is indifferent to human notions of fairness, and a report by the Fish and Wildlife Service showed a worrisome drop in the populations of several species of North Atlantic turtles, notably loggerheads, which can grow to as much as 400 pounds. The South Florida nesting population, the largest, has declined by 50% in the last decade, according to Elizabeth Griffin, a marine biologist with the environmental group Oceana. The figures prompted Oceana to petition the government to upgrade the level of protection for the North Atlantic loggerheads from “threatened” to “endangered”— meaning they are in danger of disappearing without additional help.

Which raises the obvious question: what else do these turtles want from us, anyway? It turns out, according to Griffin, that while we have done a good job of protecting the turtles for the weeks they spend on land (as egg-laying females, as eggs and as hatchlings), we have neglected the years spend in the ocean. “The threat is from commercial fishing,” says Griffin. Trawlers (which drag large nets through the water and along the ocean floor) and longline fishers (which can deploy thousands of hooks on lines that can stretch for miles) take a heavy toll on turtles.

Of course, like every other environmental issue today, this is playing out against the background of global warming and human interference with natural ecosystems. The narrow strips of beach on which the turtles lay their eggs are being squeezed on one side by development and on the other by the threat of rising sea levels as the oceans warm. Ultimately we must get a handle on those issues as well, or a creature that outlived the dinosaurs (恐龙) will meet its end at the hands of humans, leaving our descendants to wonder how creature so ugly could have won so much affection.

1.We can learn from the first paragraph that ________.

A．human activities have changed the way turtles survive

B．efforts have been made to protect turtles from dying out

C．government bureaucracy has contributed to turtles’ extinction

D．marine biologists are looking for the secret of turtles’ reproduction

2.What does the author mean by “Nature is indifferent to human notions of fairness” (Line 1, Para. 2)?

A．Nature is quite fair regarding the survival of turtles.

B．Turtles are by nature indifferent to human activities.

C．The course of nature will not be changed by human interference.

D．The turtle population has decreased in spite of human protection.

3.What constitutes a major threat to the survival of turtles according to Elizabeth Griffin?

A．Their inadequate food supply.

B．Unregulated commercial fishing.

C．Their lower reproductively ability.

D．Contamination(pollution) of sea water

4.How does global warming affect the survival of turtles?

A．It threatens the sandy beaches on which they lay eggs.

B．The changing climate makes it difficult for their eggs to hatch.

C．The rising sea levels make it harder for their hatchlings to grow.

D．It takes them longer to adapt to the high beach temperature.

高二英语阅读理解中等难度题查看答案及解析