He is writing a letter______ a pen that I have never seen before.
A. by B. with C. for D. at
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优翼小帮手同步口算系列答案科目：高中英语 来源：2015届四川省高二下学期期末英语试卷（解析版） 题型：阅读理解
The term “multitasking” originally referred to a computer’s ability to carry out several tasks at one time. For many people, multitasking has become a way of life and even a key to success. In fact, some excellent mental aerobic exercises involve engaging the brain in two or more challenging activities at a time. Although checking e-mail while talking on a phone and reading the newspaper may be second nature for some people, many times multitasking can make us less productive, rather than more. And studies show that too much multitasking can lead to increased stress, anxiety and memory loss.
In order to multitask, the brain uses an area known as the prefrontal cortex (前额叶脑皮层). Brain scans of volunteers performing multiple tasks together show that as they shift from task to task, this front part of the brain actually takes a moment of rest between tasks. You may have experienced a prefrontal cortex “moment of rest” yourself if you’ve ever dialed a phone number and suddenly forgotten who you dialed when the line is answered. What probably occurred is that between the dialing and the answering, your mind shifted to anther thought or task, and then took that “moment” to come back. Research has also shown that for many volunteers, job efficiency declines while multitasking, as compared to when they perform only one task at a time.
Multitasking is easiest when at least one of the tasks is habitual, or requires little thought. Most people don’t find it difficult to eat and read the newspaper at the same time. However, when two or more attention-requiring tasks are attempted at one time, people sometimes make mistakes.
We often don’t remember things as well when we’re trying to manage several details at the same time. Without mental focus, we may not pay enough attention to new information coming in, so it never makes it into our memory stores. That is one of the main reasons we forget people’s names—even sometimes right after they have introduced themselves. Multitasking can also affect our relationships. If someone checks their e-mail while on the phone with a friend, they may come off as absent-minded or disinterested. It can also cause that person to miss or overlook key information being passed on to them.
1.Why are some mental aerobic exercises designed to engage people in multitasking?
A. To make them more productive.
B. To reduce their stress and anxiety.
C. To develop their communication skills.
D. To help them perform daily tasks more easily.
2.According to Paragraph 2, why may a person suddenly forget who he has called?
A. He is probably interrupted by another task.
B. He may need a rest between dialing and speaking.
C. He may leave his prefrontal cortex temporarily damaged.
D. He is probably not very familiar with the person he has called.
3.People tend to make mistakes when _______.
A. the tasks require little thought
B. their relationships with others are affected
C. new messages are processed one after another
D. they perform several challenging tasks at a time
4.What is the main idea of the passage?
A. Multitasking has become a way of life.
B. Multitasking exercises need to be improved.
C. Multitasking often leads to efficiency decline.
D. Multitasking enables people to remember things better.
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科目：高中英语 来源：2015届北京市海淀区高三上期中练习英语试卷（解析版） 题型：单项填空
There is often disagreement on ____ is the better student. James or Celina?
A. who B. what C. that D. whose
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科目：高中英语 来源：2015届北京市高三上期中英语试卷（解析版） 题型：阅读理解
Humankind has tried to improve its standard of living since the very beginning of civilization. Back then, as well as today, providing food and security was the basic task for a person. However, nowadays the range of required goods has expanded significantly. People feel the need for not only some primary things, such as a piece of bread and a roof over their heads, but also for various facilities and luxuries. Providing humanity with these things is connected to the use of natural resources, which requires energy. In turn, the common sources of energy we use today cause pollution, so economic growth is almost inevitably(必然地) associated with environmental damage.
Economic growth is the increase in numbers of goods and services produced over time by an economy, and it's calculated in terms of real Gross Domestic Product（GDP）. Before growth is calculated, inflation （通货膨胀） is adjusted in order to take into account its misleading effect on the price of goods and services. Economic growth can also be explained as the increase in expected output, which results from an increase in actual output, or total demand.
There are certain aspects of economic growth which affect the environment. The first of these is the fact that in order to produce more goods and products, at a faster rate, the construction of large industrial plants is required. These plants produce a lot of waste, leading to the pollution of water and the atmosphere, which may cause negative long term health effects to nearby populations of animals, or people. They also lead to global warming.
Industrial manufacturing leads to the constantly increasing energy consumption. The traditional energy sources, which are commonly used nowadays, are considered to be the greatest polluters to the environment. There also exist so-called eco-friendly sources of energy. They are sometimes preferred but replacing the traditional sources with them also requires time, during which people have to make some sacrifices to support these undertakings.
In order to produce economically practical energy, a sometimes significant transformation of the natural site is often inevitable（必然的，不可避免的）. This is expensive and, has harmful effects on the environment. Application of wind energy would block airflows' natural speed, which is the reason for their decrease in strength, after crossing the windmill. Consequently, the pressure balance that is brought about by this current will be affected, and it is important to remember that the environment and weather conditions are directly affected by atmospheric pressure.
For these reasons, bringing about economic growth without any resulting environmental damage, whatsoever, is impossible.
1.What does the passage mainly talk about?
A. Pollution caused by plant construction
B. Effects of windmills on the environment
C. Economic growth and human civilization
D. Economic growth and environmental damage
2.What does the underlined word "They" in the third paragraph refer to?
A. Goods and products B. The industrial plants
C. Water and atmosphere D. Negative health effects
3.According to the passage, the author holds the opinion that ____.
A. economic growth should be calculated in terms of GDP
B. use of natural resources causes no damage to the environment
C. industrial manufacturing may cause damage to the environment
D. a windmill is a perfect way to produce economically practical energy
4.Which of the following shows the structure of the passage?
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科目：高中英语 来源：2015届北京市高三上期中英语试卷（解析版） 题型：单项填空
The firefighters would not allow anyone______ into the room on fire to collect anything.
A. to go B. going
C. gone D. go
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科目：高中英语 来源：2015届北京市高三上期中英语试卷（解析版） 题型：单项填空
My parents live in a small village. They always keep candles in the house _____ the electricity is cut off.
A. if B. in case
C. unless D. so that
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科目：高中英语 来源：2015届内蒙古赤峰市宁城县高三上学期统一摸底考试英语试卷（解析版） 题型：其他题
Recently some American scientists have given a useful piece of advice to people in industrialized nations．They say people should eat more of the same kind of food eaten by humans living more than 10,000 years ago．1.________
The scientists say that the human life has changed greatly．Our bodies have not been able to deal with these changes in lifestyle and this had led to new kinds of sicknesses．2._________ So they are called "diseases of civilization"．Many cancers and diseases of the blood system are examples of such diseases.
Scientists noted that people in both the Old Stone Age and the New Stone Age enjoyed very little alcohol or tobacco, probably none．3._________ However, a change in food is one of the main differences between life in ancient times and that of today.
Stone Age people hunted wild animals for their meat, which had much less fat than domestic ones．They ate a lot of fresh wild vegetables and fruits．They did not have milk or any other dairy products, and they made very little use of grains． 4. _________ We eat six times more salt than our ancestors．We eat more sugar．We eat twice as much fat but only one third as much protein and much less vitamin C.
5._________ But scientists say that we would be much healthier if we eat much the same way the ancient people did, cutting the amount of fatty, salty and sweet food.
A．Stone Age people lived a simple life.
B．But today, we enjoy eating a lot of these.
C．In that case, they would live much healthier.
D．Ancient people also got lots of physical exercise.
E．These new sicknesses were not known in ancient times.
F．People today probably don't want to live like our ancestors.
G．Modern people used to suffer from "diseases of civilization".
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科目：高中英语 来源：2015届云南玉溪第一中学高三上第二次月考英语试卷（解析版） 题型：完形填空
When I was 17 years old, I left my comfortable home in a wealthy Midwestern suburb to live as a foreign exchange student in a lower-middle-class neighborhood in a foreign country. I in an apartment with no elevators, no dishwashers and one washer for 300 . The tile(瓷砖）floors were always and the rainy winter days there seemed endless. I to wash my clothes by hand in the bathtub and water was so costly, I trained myself to my waist-length hair in less than five minutes.
At that time there were no cell phones and the Internet didn’t exist so far six months I had no at all with my family or friends in the US. I had no relatives there so I to face the fact that my to adapt and create a life for ,was one hundred percent up to me. At age seventeen my need for friends was and not knowing a soul was, needless to say, a bit stressful.
To to my stress, I didn’t speak the and had no familiarity with the monetary（货币的）system nor the transportation system. One more that created stress was my family. Of all the families in the city I lived, I was with the ones who spoke the least (or worst) English.
Living abroad and developing in a foreign language required persistence and determination. I made many mistakes the way. Now I’ve transformed my memories into my medals of honor (荣誉勋章). They’re the treasured stories that offer wisdom, provide me with insights into friends and family and provide me with the that I can surpass future challenges.
1.A. moved B. lived C. turned D. took
2.A. places B. names C. children D. families
3.A. warm B. empty C. tidy D. cold
4.A. tried B. asked C. learned D. forced
5.A. although B. since C. unless D. once
6.A. wash B. comb C. arrange D. adopt
7.A. contact B. quarrel C. letter D. chance
8.A. turned B. needed C. pretended D. stopped
9.A. imagination B. ability C. question D. career
10.A. myself B. other C. another D. none
11.A. impossibleB. hopeless C. beneficial D. strong
12.A. adapt B. apply C. add D. reduce
13.A. truth B. language C. fact D. word
14.A. scene B. shortage C. fault D. challenge
15.A. own B. former C. host D. guest
16.A. occupied B. housed C. compared D. chosen
17.A. fluency B. trouble C. habit D. fame
18.A. over B. along C. in D. during
19.A. harmful B. beautiful C. hopeful D. stressful
20.A. advantage B. confidence C. promise D. future
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科目：高中英语 来源：2015学年云南红河州弥勒第二中学高三上期中英语试卷（解析版） 题型：短文改错
短文改错 (共10分,每小题1分,满分10分)
英语课上,老师要求同桌同学相互修改作文。假设以下小作文为你同桌所写，请你对其进行修改。文中共有10处错误，每句中最多有两处。每处错误仅涉及一个单词的增加、删除或修改。
增加：在缺词处加一个漏词符号（∧），并在此符号下写出该加的词。
删除：把多余的词用斜线（\）划掉。
修改：在错的词下面划一横线，并在该词下面写出修改后的词。
注意：1. 每处错误及其修改均仅限一词；2. 只允许修改10处，多者从11处起不计分。
My father and I stayed at the South Lake Hotel for a week when we visit Beijing last month. It is in the downtown area, but it is easy to go to anywhere from the hotel by public transport. We lived in a comfortably double-room with a big bath. What I liked best were the free high-speed Internet connection in the room. I checked my email messages every day. I also shared for my friends many photos taking in Beijing. The food was wonderful with reasonable prices, and we enjoyed several local dish. It is such great hotel that I would recommend it to any friend of me who is going to Beijing.
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