单选题It took US a long time to{{U}} mend{{/U}} the house.

单选题He was so greatly attracted by the beauty of the Xixi Wetland that he decided to visit there again.

单选题In the last paragraph the word "persistent" means

单选题She could not answer, it was an {{U}}immense{{/U}} load off her heart.

单选题 下面有3篇短文，每篇短文后有5道题，每道题后面有4个选项。{{B}}第一篇{{/B}} {{B}}A Thirsty World{{/B}} The world is not only hungry; it is also thirsty for water. This seems strange to you, since nearly 75% of the earth's surface is covered with water. But about 97% of this huge amount is from sea water, or salt water. Man can only drink and use the other 3% — the fresh water that comes from rivers, lakes, underground, and other sources. And we cannot even use all of that, because some of it is in the form of iceberg (冰山) and glaciers (冰串). Even worse, some of it has been polluted. At the moment, this small amount of fresh water is still enough for us. However, our need for water is increasing rapidly. Only if we take steps to deal with this problem now can we avoid a severe worldwide water shortage later on. A limited water supply would have a bad effect onagriculture and industry. In addition to stopping wasting our precious water, one useful step we should take is to develop ways of reusing it. Experiments have already been done in this field, but only on a small scale. Today, in most large cities tanks, water is used only once and it eventually returns to the sea or runs into underground storage tanks. But it is possible to pipe water that has been used to a purifying (净化) plant. There it can be filtered (过滤) and treated with chemicals so that it can be used again just as it were fresh from a spring. But even if every large city purified and reused its water, we still would not have enough. Where could we turn next? To the oceans! All we'd have to do to make use of the vast amount of sea-water is — remove the salt. This salt-removing process is already in use in many parts of the wodd.

单选题下面的短文有15处空白，请根据短文内容为每处空白确定1个最佳选项。 Inflation Business and government leaders also consider the inflation rate to be an important general indicator. Inflation is a period of increased spending that causes rapid rises in prices. {{U}}(51) {{/U}} your money buys fewer goods so that you get {{U}}(52) {{/U}} for the same amount of money as before, inflation is the problem. There is a general rise {{U}}(53) {{/U}} the price of goods and services. Your money buys less. Sometimes people describe inflation as a time when "a dollar is not worth a dollar anymore". Inflation is a problem for all consumers. People who live on a fixed income are hurt the {{U}}(54) {{/U}}. Retired people, for instance, cannot count on an increase in income as prices rise. Elderly people who do not work face serious problems in stretching their incomes to {{U}}(55) {{/U}} their needs in time of inflation. Retirement income {{U}}(56) {{/U}} any fixed income usually does not rise as fast as prices. Many retired people must cut their spending to {{U}}(57) {{/U}} rising prices. In many cases they must stop {{U}}(58) {{/U}} some necessary items, such as food and clothing. Even {{U}}(59) {{/U}} working people whose incomes are going up, inflation can be a problem. The {{U}}(60) {{/U}} of living goes up, too. People who work must have even more money to keep up their standard of living. Just buying the things they need costs more. When incomes do not keep {{U}}(61) {{/U}} with rising prices, the standard of living goes down. People may be earning the same amount of money, but they are not living as well because they are not able to buy as many goods and services. Government units gather information about prices in our economy and publish it as price indexes {{U}}(62) {{/U}} the rate of change can be determined. A price index measures changes in prices using the price for a {{U}}(63) {{/U}} year as the base. The base price is set at 100, and the other prices are reported as a {{U}}(64) {{/U}} of the base price. A price index makes {{U}}(65) {{/U}} possible to compare current prices of typical consumer goods, for example, with prices of the same goods in previous years.

单选题Last winter, she bought a pair of beautiful boots .

单选题We aim to increase the speed of delivery.

单选题In temperate regions the growth rings on turtles’ epidermal plates {{U}}reflect{{/U}} seasonal variations in growth.

单选题Many of novelist Carson McCullers' characters are Uisolated/U, disappointed people.

单选题The Mayan civilization flourished on the Yucatan peninsula of Mexico.A. profitedB. gainedC. benefitedD. prospered

单选题The weather turned to be very good, ______ was more than we could expect.A. whatB. whichC. thatD. it

单选题Our statistics show that we consume all that we are capable of producing.

单选题He has trouble understanding that other people judge him by his social skills and {{U}}conduct{{/U}}.

单选题Acetate is one of the most important {{U}}artificial{{/U}} fibers.

单选题High-tech Warfare Today, high-tech warfare (战争) is no longer an abstract concept, but a real issue. Technology 1 tactics, sociology, and the development of weaponry (武器). It also causes the changes in battles. Then what are the new characteristics of modern battles 2 by the application of high technologies? High-tech warfare naturally includes high technology. In modern battles, a single kind of weapon can hardly be 3 . Various weaponry, such as intelligence detection and information processing, should 4 well with each other. Aerial (航空的) weaponry becomes the main force in battles in the sky. Precision homing (精确自导) weaponry like cruise missiles and missiles 5 satellite homing systems becomes the main attack weapons. Battle control systems play a dominant role. Various weapons and logistics (后勤) systems are 6 into a comprehensive framework, centrally representing the modern high-tech weaponry. Depending on various 7 equipment and means in electronic warfare, our army will not be passively beaten. 8 the battlefield ,high-tech warfare has created a type of non-linear (非线性的) chaos. Because of the use of long-range precision weaponry, the opposite parties in warfare can"t "touch" or "see" each other, and distance is no longer the decisive factor affecting the 9 of battles. It is hard to clearly define the lines between the frontier and the rear, as well as attack and defense. The traditional three-dimensional air-sea battlefield will be 10 by the multi-dimensional battlefield composed of air, sea, magnetic, electrical and information battlefields. No large.-scale movements can be conducted 11 . Because modern weaponry systems are closely related to chains of demand and communication and electronic technology, the parties 12 have to pay attention to the usufruct (使用权) and control of electromagnetic frequency spectrum. So electronic Warfare becomes 13 important and the necessary guarantee of victory. Whatever 14 warfare goes to and whatever cloak (宽 大外衣) it wears, it always violates peace and brings the world bloodshed (流血). Most people think of high technology as a 15 to enhance their lives, and they don"t wish it to be used to destroy lives.

单选题They have the capability to destroy the enemy in a few days.

单选题John {{U}}removed{{/U}} his overcoat.

单选题{{B}}第二篇{{/B}} {{B}} Thanksgiving Day{{/B}} The American Thanksgiving Day celebration goes back to 1621. In that year, a special dinner was prepared in Plymouth, Massachusetts. The people who had settled there had left England because they were forbidden to keep their religious belief. They came to the new land and faced difficulties in sailing across the ocean. The ship which carried them was called "the Mayflower". The North Atlantic was hard to travel. There were bad storms and huge waves. With the help of the Indians, they learned to live in the new land. These Puritans, as they were called, had much to be thankful for. They could enjoy religious freedom. They learned how to grow their crops in accordance with the climate and soil. Now when they selected the fourth Thursday of November for their Thanksgiving celebration, they invited their neighbors, the Indians, to join them in dinner. They also wanted to pray God for the new life. They recalled the group of 102 men, women and children who left England. They remembered those who did not live to see the shores of Massachusetts. They thought of the 65 day's journey which tested their strength.

单选题Computer Mouse The basic computer mouse is an amazingly clever invention with a relatively simple design that allows us to point at things on the computer and it is very productive. Think of all the things you can do with a mouse like selecting text for copying and pasting (涂), drawing, and even scrolling on the page with the newer mice with the wheel. Most of us use the computer mouse daily without stopping to think how it works until it gets dirty and we have to learn how to clean it. We learn to point at things before we learn to speak, so the mouse is a very natural pointing device. Other computer pointing devices include light pens, graphics (图形) tablets and touch screens, but the mouse is still our workhorse. The computer mouse was invented in 1964 by Douglas Englehart of Stanford University. As computer screens became more popular and arrow keys were used to move around a body of text, it became clear that a pointing device that allowed easier motion through the text and even selection of text would be very useful. The introduction of the mouse, with the Apple Lisa computer in 1983, really started the computer public on the road to relying on the mouse for routine (常规) computer tasks. How does the mouse work? We have to start at the bottom, so think upside down for now. It all starts with the mouse ball. As the mouse ball in the bottom of the mouse rolls over the mouse pad, it presses against and turns two shafts (轴). The shafts are connected to wheels with several small holes in them. The wheels have a pair of small electronic light-emitting devices called light-emitting diodes (LED) mounted on either side. One LED sends a light beam to the LED on the other side. As the wheels spin and a hole rotates by, the light beam gets through to the LED on the other side. But a moment later the light beam is blocked until the next hole is in place. The LED detects (发现) a changing pattern of light, converts the pattern into an electronic signal, and sends the signal (发信号) to the computer through wires in a cable that goes out the mouse body. This cable is the tail that helps give the mouse its name. The computer interprets the signal to tell it where to position the cursor on the computer screen. So far we have only discussed the basic computer mouse that most of you probably have or have used. One problem with this design is that the mouse gets dirty as the ball rolls over the surface and picks up dirt. Eventually you have to clean your mouse. The newer optical mice avoid this problem by having no moving parts.