单选题Children ______ half of their 23 pairs of chromosomes(染色体)from each parent.

单选题The recent medical breakthrough was the {{U}}culmination{{/U}} of many long years of experimentation.

单选题What is said about the development of the helicopter?

单选题A: Look, it's going to storm. Take my umbrell

单选题The National Institute of Mental Health is conducting a far-reaching research to determine the psychological effects of using drug.

单选题A {{U}}brisk{{/U}} walk in cool weather is invigorating.

单选题Man: We're almost finished with the project. Maybe we should stop for a break now. Woman: Actually, I would prefer to keep going. Question: What does the woman mean?

单选题Any expenses you may ______ will be chargeable to the company.

单选题A: Congratulations! I heard you got a promotion. When was it announced? B: ______.

单选题Man: I hate to attend the history class.Woman: You make it sound like prison. What's wrong with it?Man: It seems like the teacher never tells us what we really need to know.Question: Why does the man hate to go to his history class?

单选题A：Boston Hotel．May I help you? B：______

单选题Although the police (are) given considerable authority by society to enforce (it's) laws, they get a relatively low salary as compared with (that) of other occupational groups which have much (fewer) authority.

单选题{{B}}Passage Two{{/B}} Last week 29 earnest American high school students were invited to an evening of receiving good words, small talk, warm toasts and fancy silverware. "Find out something about the person sitting next to you," advised former US Secretary of State Madeleine Albright. "Eventually, you'll discover they always have something interesting to say. And you should always use the proper silverware in the proper order. " Albright was the guest of honor at the imitated Official Dinner, which was a lot like a real official dinner in Washington minus the soft money. The evening was sponsored by the St. Albans School of Public Services to introduce its first class to the fine art of social survival. More than 84 guests, including students, teachers, school donors and speakers, gathered to {{U}}replicate{{/U}} the lifestyle of the rich and political. The idea was to teach the social graces that will help students survive any social situation. Anyway, the whole proper fork thing is overrated. Former White House official C. Boyden Gray shared his top tips for surviving dinner parties: "Drink as little as possible until you get to dinner. " "Don't be the first person there or the last person to leave. " "Try to get more out of your dinner partners than they get out of you." Every Official Dinner has a greater reason for being. State dinners, for example, are either an opportunity to reward emerging democracies or strengthen old friendships. The Official Dinner was intended to show the students an elegant evening in Washington—part of the four-week intensive summer program to encourage public service. The students are from 13 states and two foreign countries. The program includes classes on the presidency, the courts, the media and international affairs. The students also debated public policy issues. "They're still at it at 10 o'clock at night," said director Mary Waikart. "That's good practice for Washington, isn't it?" Since there was no band, Albright offered herself up as the night's entertainer. No singing, but stories about her life in diplomacy. "Being secretary of state is the best job in the world," she said. " Better than being president, because you don't have to deal with the elections."

单选题The new tenant (in) the apartment was (obviously) both (suspicious) and interested (in) his neighbors.A. inB. obviouslyC. suspiciousD. in

单选题When a man knows that he will be put into prison if he uses a potentially deadly object to rob or do harm to another person, he will think twice about it.

单选题The old scientist decided to move to his country home ______ his advanced age and poor health.

单选题They have______her unreasonable request for her annual salary.

单选题If you expect too much of the students, you are sure to ______ disappointed and miserable.

单选题The Commercial Revolution was not confined, of course, to the growth of trade and banking. Included in it also were fundamental changes in methods of production. The system of manufacture developed by the craft guilds in the later Middle Ages was rapidly be- coming defunct. The guilds themselves, dominated by the master craftsmen, had grown selfish and exclusive. Membership in them was commonly restricted to a few privileged families. Besides, they were so completely choked by tradition that they were unable to make adjustments to changing conditions. Moreover, new industries had sprung up entirely outside the guild system. Characteristic examples were mining and smelting and the woolen industry. The rapid development of these enterprises was stimulated by technical advances, such as the invention of the spinning wheel and the discovery of a new method of making brass, which saved about half of the fuel previously used. In the mining and smelting in dustries a form of organization was adopted similar to that which has prevailed ever since. But the most typical form of industriai production in the Commercial Revolution was the domestic system, developed first of all in the woolen industry. The domestic system derives its name from the fact that the work was done in the homes of industrial artisans instead of in the shop of a master craftsman. Since the various jobs in the manufacture of a product were given out on contract, the system is also known as the putting out system. Notwithstanding the petty scale of production, the organization was basically capitalistic. The raw material was purchased by an entrepreneur and assigned to individual worker, each of whom would complete his allotted task for a stipulated payment. In the case of the woolen industry the yam would be given out first of all to the spinners, then to the weavers, fullers, and dyer in succession. When the cloth was finally finished, it would be taken by the clothier and sold in the open market for the highest price it would bring.