The police are _____ to conclude that the cau...

The police are _____ to conclude that the cause of fire was a cigarette end.

A. probable　　 B. possible

C. maybe　　 D. likely

高一英语单项填空简单题查看答案及解析

It was probably _______ the wrong operation(操作) of the pilot that caused the plane to crash.

高一英语单项填空简单题查看答案及解析

It was probably _______ the wrong operation(操作) of the pilot that caused the plane to crash.

A. because of       B. because           C. as a result       D. \

高一英语单项填空中等难度题查看答案及解析

We were scared to death when the fire _______ . Fortunately, it was put out before it caused much damage.

A. broke out　　 B. came out

C. gave out　　 D. turned out

高一英语单项填空中等难度题查看答案及解析

The most widespread fallacy (谬论)of all is that colds ire caused by cold. They are actually caused by viruses passing on from person to person. You catch a cold by coining into contact, directly or indirectly, with someone who already has one. If cold causes colds, it would be reasonable to expect the Eskimos to suffer from them forever But they do not. And in the isolated Arctic Regions explorers have reported being free from colds until coming into contact again with infected people from the outside world by way of packages and mail dropped from airplanes.

During the First World War soldiers who spent long periods in the trenches(战壕), cold and wet, showed no increased tendency to catch colds.

In the Second World War prisoners at the Auschwitz concentration camp，naked and starving, were astonished to find that they seldom had colds. At the Common Cold Research Unit in England, volunteers took part in experiments in which they gave themselves to the discomforts of being cold and wet for long stretches of time. After taking hot baths, they put on bathing suits, allowed themselves to be with cold water, and then stood about dripping wet in drafty rooms. Some wore wet socks all day while others exercised in the rain until close to exhaustion. Not one of the volunteers came down with a cold unless a cold virus was actually dropped in his nose.

If then, cold and wet have nothing to do with catching colds, why are they more frequent in the winter. Despite the most pains-taking research, no one has yet found the answer. One explanation offered by scientists is that people tend to stay together indoors more in cold weather than at other times, and this makes it easier for cold viruses to be passed on.

1.The writer offered 　　　　　 examples to support his argument

A. 4　　 B. 5

C. 6　　 D. 7

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

A. The Eskimos suffer from colds from time to time.

B. Colds are not always caused by cold.

C. People suffer from colds just because they like to stay indoors.

D. A person may catch a cold by touching someone who already has one.

3.Arctic explorers may catch colds when they are 　　　　　 .

A. working in the isolated arctic regions

B. writing reports in terribly cold weather

C. free from work in the isolated arctic regions

D. coming into touch again with the outside world

4.Volunteers taking part in the experiments in the Common Cold Research Unit 　　　　　 .

A. suffered a lot　　 B. never caught colds

C. often caught colds　　 D. became very strong

5.The passage mainly discusses 　　　　　 .

A. the experiments on the common cold

B. the fallacy about the common cold

C. the reason and the way people catch colds

D. the continued spread of common colds

高一英语阅读理解中等难度题查看答案及解析

The local government announced that only when the fire was under control ________ to return to their homes.

A．the residents would be allowed            B．had the residents been allowed

C．would the residents be allowed             D．the residents had been allowed

高一英语单项填空困难题查看答案及解析

Some colors people see late at night could cause signs of clinical（临床的）depression (沮丧). That was the finding of a study that builds on earlier study findings. They show that individuals (个人) who live or work in low levels of light overnight (整夜) can develop clinical depression. Doctors use the word “clinical depression” to describe severe form of depression. Signs may include loss of interest or pleasure in most activities, low energy levels and thoughts of death or suicide.

In the new study, American investigators designed an experiment that exposed hamsters（仓鼠）to different colors. The researchers chose hamsters because they are nocturnal（夜行的）, which means they sleep during the day and are active at night.

The animals were separated into four groups. One group of hamsters was kept in the dark during their night-time period. Another group was placed in front of a blue light, a third group slept in front of a white light, while a fourth was put in front of a red light.

After four weeks, the researchers noted how much sugary water the hamsters drank. They found that the most depressed animals drank the least amount of water.

Randy Nelson heads the Department of Neuroscience at Ohio State University. He says animals that slept in blue and white light appeared to be the most depressed. “What we saw is that these animals didn’t show any sleep uneasiness (不安) at all but they did mess up biological clock genes and they did show depressive sign while if they were in the dim（微弱）red light, they did not.”

Randy Nelson notes that photosensitive（感光）cells in the eyes have little to do with eyesight. He says these cells send signals to the area of the brain that controls what has been called the natural sleep-wake cycle.

He says there’s a lot of blue in white light. This explains why the blue light and white light hamsters appear to be more depressed than the hamsters seeing red light or darkness.

1.Researchers use hamsters in the experiment because __________.

A. they are similar to humans in dealing with colors

B. they are easy to observe and study

C. they are sensitive to colors like human beings

D. they are active at night and sleep during the day

2.What sign shows that the hamsters are being depressed?

A. They drink less sugary water.　　 B. They don’t sleep well.

C. Their eyesight becomes worse.　　 D. Their energy level becomes low.

3.What can help people who work late at night to avoid being depressed?

A. Not being exposed to dim red light when using computers.

B. Equipping their computer screens to put it more in the reddish light.

C. Living or working in low levels of light overnight.

D. Going to see doctors of clinical depression regularly for help.

高一英语阅读理解中等难度题查看答案及解析

It was announced that only when the fire was under control _______ permitted to return to their homes.

A．would villagers be                       B．villagers would be

C．should villagers be                       D．villagers should be

高一英语单项填空中等难度题查看答案及解析

Some colors people see late at night could cause signs of clinical (临床的) depression. That was the finding of a study that builds on earlier study findings. They show that individuals who live or work in low levels of light overnight can develop clinical depression. Doctors use the word “clinical depression” to describe severe form of depression. Signs may include loss of interest or pleasure in most activities, low energy levels and thoughts of death or suicide.

In the new study American investigators designed an experiment that exposed hamsters (仓鼠) to different colors. The researchers chose hamsters because they are nocturnal which means they sleep during the day and are active at night.

The animals were divided into four groups. One group of hamsters was kept in the dark during their night-time period. Another group was placed in front of a blue light a third group slept in front of a white light while a fourth was put in front of a red light.

After four weeks the researchers noted how much sugary water the hamsters drank. They found that the most depressed animals drank the least amount of water.

Randy Nelson heads the Department of Neuroscience at Ohio State University. He says animals that slept in blue and white light appeared to be the most depressed. “What we saw is that these animals didn’t show any sleep uneasiness at all but they did mess up biological clock genes and they did show depressive sign while if they were in the dim (微弱) red light they did not.”

He notes that photosensitive (感光) cells in the eyes have little to do with eyesight. He says these cells send signals to the area of the brain that controls what has been called the natural sleep-wake cycle.

He says there’s a lot of blue in white light. This explains why the blue light and white light hamsters appear to be more depressed than the hamsters seeing red light or darkness.

1.Researchers use hamsters in the experiment because __________.

A.they are similar to humans in dealing with colors

B.they are easy to observe and study

C.they are sensitive to colors like human beings

D.they are active at night and sleep during the day

2.What sign shows that the hamsters are being depressed?

A.Their energy level becomes low. B.They don’t sleep well.

C.Their eyesight becomes worse. D.They drink less sugary water.

3.__________ tends to cause hamsters to be depressed.

A.Dim light B.Blue light

C.Red light D.Darkness

4.What can help people who work late at night to avoid being depressed?

A.Equipping their computer screens to put it more in the reddish light.

B.Not being exposed to dim red light when using computers.

C.Living or working in low levels of light overnight.

D.Going to see doctors of clinical depression regularly for help.

高一英语阅读理解中等难度题查看答案及解析

It was announced that only when the fire was _________ would residnts(居民) be permitted to return to their homes.

高一英语单项填空中等难度题查看答案及解析