单选题How many things can you see in the night sky? A lot! On a clear night you might see the Moon, some planets, and thousands of sparkling stars. You can see even more with a telescope. But scientists believe there are some things in the sky that we will never see. We won't see them with the biggest telescope in the world, on the clearest night of the year. That's because they're invisible. They're the mysterious dead stars called black holes. As a star's gases burn, they give off light and heat. But when the gas runs out, the star stops burning and begins to die. As the star cools, the outer layers of the star pull in toward the center. The star squashes (挤压) into a smaller and smaller ball. If the star was very small, the star ends up as a cold, dark ball called a black dwarf. If the star was very big, it keeps squashing inward until it's packed together tighter than anything in the universe. Imagine if the Earth were crushed until it was the size of a tiny marble. That's how tightly this dead star, a black hole, is packed. What pulls the star in toward its center with such power? It's the same force that pulls you down when you jump—the force called gravity. A black hole is so tightly packed that its gravity sucks in everything—even light. The light from a black hole can never come back to your eyes. That's why you see nothing but blackness. So remember: Scattered in the silent darkness are black holes—the great mystery of space.

单选题When did Mr. Payseur realized the missing of his metal box?

单选题I was so bored with the verbose and redundant style of that writer that I welcomed the change to the ______ style of this author.

单选题Tony as well as his brothers and sisters______from America.

单选题 The Central Government's pledge to maintain the ______ and stability of Hong Kong at all costs is a great encouragement to the local finance.

单选题Because of the poor harvest, wheat prices have ______ in the last six months.

单选题The task was very tough, but we managed to solve it ______.

单选题As a new teacher, I have some difficulty _____organizing discussions in class.

单选题Simon's letter was in such a casual scrawl, and in such pale ink, that it was

单选题That Lydia was able to ______ the situation seemed to allow everyone to breathe a deep sigh of relief.

单选题Culture is the sum total of all the traditions, customs, beliefs, and ways of life of a given group of human beings. In this 27 , every group has a culture, however savage, undeveloped, or uncivilized it may seem to us. To the professional anthropologist (人类学家), there is no intrinsic 28 of one culture over another, just as to the professional linguist there is no intrinsic hierarchy (等级制度) among languages. People once thought of the languages of backward groups as 29 and undeveloped forms of speech, consisting largely of grunts and groans. While it is possible that language in general began as a series of grunts and groans, it is a fact established by the study of 'backward' languages that no spoken tongue answers that description today. Most languages of uncivilized groups are, by our most severe standards, extremely complex, delicate, and ingenious pieces of machinery for the 30 of ideas. They fall behind our Western languages not in their sound patterns or 31 structures, which usually are fully adequate for all language needs, but only in their vocabularies, which 32 the objects and activities known to their speakers. Even in this department, however, two things are to be noted: 1. All languages seem to 33 the machinery for vocabulary expansion, either by putting together words already in existence or by borrowing them from other languages and adapting them to their own system. 2. The objects and activities requiring names and distinctions in 'backward' languages, while different from ours, are often surprisingly 34 and complicated. This study of language, in turn, 35 a new light upon the claim of the anthropologists that all cultures are to be viewed 36 , and without ideas of rank or hierarchy. A. savage B. superiority C. conceive D. transfer E. identification F. grammatical G. reflect H. reveals I. numerous J. independently K. exclusive L. casts M. sense N. confidentially O. possess

单选题A dark suit is ______ to a light one for evening wear.

单选题A. knock B. knowledge C. kilometer D. knee

单选题The effect of the baby boom on the schools helped to make possible a shift in thinking about the role of public education in the 1920's. In the 1920's, but especially (1) the Depression of the 1930's, the United States experienced a (2) birth rate. Then with the prosperity (3) on by the Second World War and the economic boom that followed it, young people married and (4) households earlier and began to (5) larger families than had their (6) during the Depression. Birth rates rose to 102 per thousand in 1946, 106.2 in 1950, and t18 in 1955. (7) economics was probably the most important (8) , it is not the only explanation for the baby boom. The increased value placed (9) the idea of the family also helps to (10) this rise in birth rates. The baby boomers began streaming (11) the first grade by the mid-1940's and became a (12) by 1950. The public school system suddenly found itself (13) The wartime economy meant that few new schools were built between 1940 and 1945. (14) , large numbers of teachers left their profession during that period for better-paying jobs elsewhere. (15) , in the 1950's, the baby boom hit an antiquated and inadequate school system. Consequently, the custodial rhetoric of the 1930's no longer made (16) ; keeping youths ages sixteen and older out of the labor market by keeping them in school could no longer be a high (17) for an institution unable to find space and staff to teach younger children. With the baby boom, the focus of educators (18) turned toward the lower grades and back to basic academic skills and (19) . The system no longer had much (20) in offering nontraditional, new, and extra services to older youths.

单选题After walking for hours without finding the village, we began to have ______ about our map.

单选题If you want to find the bookseller's number, you could look it up in the telephone

单选题______ but I still like him.

单选题 Questions2-4 are based on the conversation you have just heard.

单选题With the US economy slowing down, layoffs are everywhere. No industry is spared. If you end up having to start over, in addition to starting your job search, there are several things you should take care of to make your transition a smooth one. First and foremost, clear up any misunderstanding about how and why you left your last job with your exboss. Whether you left voluntarily, were fired or were laid off due to budget cutbacks, make sure you both have the same explanation. Agree on job titles ac cordingly. Also ask for a reference if you think your exboss will offer one and you trust that he or she will speak honestly about your performance. You should have a source of emergency cash that you can use in the interim. Don't panic and liquidate your stocks and bonds just yet, be optimistic in your prospects while also be more frugal than usual. You should save money on not having to dry clean work clothes so often and eating less takeout lunches. Save money by not eating out at restaurants and watch videos rather than going to the movies every weekend. Make a note of your job hunting expenses, such as career counselors' consulting fees and resume printing costs, and save the receipts. By next year's taxfiling time, you could get deductions on your jobsearch expense (unless you left a job willingly or was a college graduate looking for your first job). Most companies terminate your medical insurance coverage as soon as you stop working for them. But it doesn't mean you have to forgo medical coverage altogether. There is something called Consolidated Omnibus Budget Reconciliation Act (COBRA) in the United States that legally protects an exemployee's right to stay in the company's health care plan. However, the company will stop paying your premiums, and you will have to pay out of your pocket the expenses. This is still a good option compared to no health insurance at all. Another important thing to take care of when you change jobs is your 401(k) ac count. A 401(k) is the retirement fund that most companies offer. It's named after section 401(k) in the Internal Revenue Service's policy documents. You put aside a percentage of your paycheck each pay period, and the money accumulated will be managed by the 401 (k) fund manager your employer has hired and is invested in the stock market. You cannot withdraw money from this account until you reach this age, or you will incur penal ties. When you leave a job, the money can sometimes be kept with your exemployer for a while. It's always a good idea to compare your new employer's 401(k) plan with your old one. Every company offers different types of investment options, from overseas stocks to hightech stocks and everything in between. If you do want to transfer the account to your new employer, you need to go to the human resources department and ask for forms that help you make the transition. Don't forget to ask for job leads from your excoworkers. Even if you are leaving for a job in another industry, you never know what people they happen to know that can help with your job search. Keep in touch with the friends you have made at your old job. Remember to anchor yourself to people, not institutions, and you will find that any transition is made easier.