文中共有10处语言错误，每句中最多两处。错误涉及一个单词的增加、删除或修改。
增加：在此处加一个漏词符号（∧），并在其下面写出该加的词。
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.每处错误及修改均仅限一词；
2.只允许修改10处，多者（从11处起）不计分。
Dear Brad,
I’m very glad to hear from you. In your last letter you ask about the post-80s in China. Actually I am the boy who belongs to this group. Comparing with our parents, life for us is getting much hard. The job market is tough and the house is expensively to afford. Now many girls prefer to marry with a man who owns a house and a car. Therefore, I don’t think love built on house and cars is true love, and I doubt how long it will last.
As a matter of fact, though situations are tough today, a lot of we post-80s are making great efforts live a good life. I believe we will have a nice future.
Li Hua
根据下列各句句意和空白之后的汉语提示词，在答题卡指定区域的横线上写出对应单词的正确形式，每空只写一词。
1.You can get even better deals if you are prepared to _______（讨价还价）.
2.He left a ______(留言) on the table before he went to explore the cave.
3.They got lost in the desert and _____(挨饿) to death.
4.His devotion to his work is _______(令人钦佩的).
5.Coca-cola is a household word ______(遍及) the world.
6.The boy is now having his hair cut at the _______(理发店).
7.It is easy to find out the _______(大概的) idea of the passage.
8.That Peter hasn’t accepted our invitation is _______(令人失望的).
9.I changed into my sports shoes so that I could walk more _______(舒服地).
10.Old Joe kicked the bucket just two days before his _____(九十)birthday.
根据短文内容，从下边的A—F选项中选出能概括每一段主题的最佳选项。选项中有一项为多余选项。
A . The different structure of blue holes.
B. Why scientists are interested in blue holes.
C. How a blue hole comes into being.
D. Blue holes exploring is becoming popular.
E. Rules to obey when diving into blue holes.
F. The general definition of a blue hole.
1.______________
A blue hole is a flooded sea cave with a hole that opens up at the land's surface. These cave systems form in carbonate rock, often on islands. Some blue holes have very special rock formations and water chemistry. Far below sea level, they contain some of the harshest environments on Earth, with no oxygen and no light. Yet these areas are filled with life forms that have adapted to the extreme conditions.
2.___________
Blue holes get their name from the color some have when seen from the air. The color is usually a reflection of the sky on the water. Blue holes are the result of erosion in which water breaks down rock. Rain falling thousands of years ago contained chemicals which slowly wore away at the limestone landmass. These holes later filled with sea water as the sea level changed. The rising and falling of sea levels and the mixture of salt and fresh water further wore away at these cave formations.
3.___________
These flooded cave systems can be found in the ocean, or they can be found inland. Ocean caves are affected by tides, so they always have water movement. But blue holes on land are very still. They have several layers of water, chemicals, and bacteria. The top layer of fresh water comes from rainfall. This layer acts like a cap on top of the layered mixture, and keeps out oxygen from the atmosphere. The fresh water floats on a denser layer of saltwater. Underneath this is a layer of poisonous hydrogen sulfide, produced by bacteria living in the water. Underneath this layer is anoxic seawater -- water that does not contain any oxygen.
4.___________
Information gathered from these blue holes is helping scientists to increase their understanding of biology, archaeology and geology. But exploring these blue hole environments brings danger as well as discovery. Scientists are interested in these caves because oxygen-free conditions there are similar to those on Earth long ago, before oxygen existed on our planet. But there are many difficulties involved in diving into blue holes.
5.___________
One reason blue holes have not been fully explored is that they can be extremely dangerous. There are many safety rules that divers must follow to help ensure their survival. First, divers must have training and experience to swim in these caves. Divers who explore a cave for the first time must establish a thin rope called a guideline. This line helps them to safely enter and exit the cave without getting lost.
Europe’s deadly outbreak of a rare form of E. coli bacteria (大肠杆菌) has brought new attention to food safety issues. One of the problems when people get sick from food is that the simplest question is often difficult or even impossible to answer. Just what did the people eat that made them sick?
Of course, one way to avoid these medical mysteries is to keep dangerous organisms out of the food supply. This is easier said than done, but scientists keep looking for new ways.
Scientists in the United States have developed an experimental system that uses a high-tech optical scanner. The system is designed to identify the presence of contaminants(致污物) like soil or animal waste on fresh produce. These can be sources of E. coli. E. coli bacteria naturally live in the intestines(肠) of humans and many animals. Most kinds of E. coli are harmless but some can make people sick.
The new scanner can also show damage and imperfections that might make the produce unappealing to shoppers.
Scientists designed the system at a Department of Agriculture research center in Beltsville, Maryland. Moon Kim of the Agricultural Research Service led the team.
MOON KIM: “We were requested, we were asked, to develop a method to detect contamination in produce. So we started with the apple as the model sample.”
The scanner uses a high-speed camera placed over the conveyer belt that moves the produce along. As the apples move along the belt, the scanner captures images of each piece of fruit.
Moon Kim says the team hopes the system will be available before long.
MOON KIM: “We are targeting for development in commercial plants for the next several years.”
The scanner can direct a sorting machine to separate the bad apples from the good ones. The system is currently able to show the surface of only half the apple as it speeds by. The inventers hope to improve the process so it can show the whole surface.
1.What is the main topic of the text?
A．Bacteria. B．A high-tech scanner.
C．A camera D．Food safety.
2.E. coli bacteria ______.
A．broke out all over the world B．comes from soil or animal waste
C．is extremely harmful to health D．does not cause illness
3.The high-tech scanner ______.
A．can help to sort out different fruits
B．make the produce appeal to shoppers
C．can only capture images of the whole apple
D．can identify the presence of contaminants
4.What can be inferred from the text?
A．The scanner needs to be improved.
B．The scanner will be available in the next several years.
C．Moon Kim is unwilling to develop the scanner.
D．The scanner is connected to a sorting machine.
Until the 1980s, the American homeless population is mainly made up of older males. Today, homelessness strikes much younger part of society. In fact, a 25-city survey by the U. S. Conference of Mayors in 1987 found that families with children make up the fastest growing part of the homeless population. Many homeless children gather in inner cities; this transient(变化无常的) and frequently frightened student population creates additional problems — both legal and educational — for already overburdened urban school administrators and teachers.
Estimates of the number of homeless Americans range from 350,000 to three million. Likewise, estimates of the number of homeless school children vary radically. A U.S. Department of Education report, based on state estimates, states that there are 220,000 homeless school-age children, about a third of whom do not attend school on a regular basis. But the National Coalition for the Homeless estimates that there are at least two times as many homeless children, and that less than half of them attend school regularly.
One part of the homeless population that is particularly difficult to count consists of the “throwaway” youths who have been cast of their homes. The Elementary School Center in New York City estimates that there are 1.5 million of them, many of whom are not treated as children because they do not stay in family shelters and tend to live by themselves on the streets.
Federal law, the Stewart B. McKinney Homeless Assistance Act of 1987, includes a section that addresses the educational needs of homeless children. The educational provisions（规定） of the McKinney Act are based on the belief that all homeless children have the right to a free, appropriate education.
1.It is implied in the first paragraph that ____.
A．the writer himself is homeless, even in his eighties
B．many older homeless residents are going on strike in 25 cities
C．there is a serious shortage of academic facilities
D．homeless children are denied the opportunity of receiving free education
2.The National Coalition for the homeless believes that the number of homeless children is _____.
A．350,000 B．1,500,000 C．440,000 D．110,000
3.One part of the homeless population is difficult to estimate. The reason might well be ____.
A．the homeless children are too young to be treated as children
B．the homeless population is growing rapidly
C．the homeless children usually stay outside school
D．some homeless children are deserted by their families
4.The McKinney Act is mentioned in this passage in order to show that ___.
A．the educational problems of homeless children are being recognized
B．the estimates on homeless children are hard to determine
C．the address of grade-school children should be located
D．all homeless people should have free education
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1.This advertisement aims at calling on people to ________.
A．attend full-time universities
B．work part time to further their education
C．improve their education at home to get better jobs
D．earn their degrees in different ways that suit them
2.Which of the following is NOT clearly mentioned in this advertisement?
A．The way how you will get your degree.
B．Tuition price.
C．The hot fields you will be preparing yourself for.
D．The length of time it will take you to get a degree.
3.What does the writer of this ad intend to say by naming General Electric, IBM, Ford, etc.?
A．To show that their training is widely used in the country.
B．To show that the training program is fully supported by famous companies in the U. S.
C．To prove the value of their training in every area.
D．To show the importance of getting recognized by the most famous companies.
4.It seems to the writer that the greatest attraction for people to take their training is______.
A．its convenience
B．the degree’s nation-wide recognition
C．the economic benefit it will bring about
D．the hot fields the training will help people to enter
