单选题The normal human daily cycle of activity is of some 7-8 hours' sleep ______ with some 16-17 hours' wakefulness. Broadly speaking, the sleep normally coincides with the hours of darkness. A. rotating B. alternating C. varying D. following

单选题Learner drivers have to keep their previous jobs ______

单选题 Questions 21 to 23 are based on the following news. At the end of the news item, you will be given 15 seconds to answer the questions. Now listen to the news.

单选题 American federalism has been described as a neat mechanical theory. The national government was said to be sovereign in certain areas of governmental concern, such as the regulation of interstate commerce. State governments were said to be sovereign in certain other areas, such as regulation of intrastate commerce and exercise of the police power. One writer has described this as the "layer cake" concept of American federalism. In the top layer are neatly compacted all the powers of the national government; in the bottom layer are found the separate and distinct functions and powers of state governments. How nice it would be if the American federal system could be so easily and conveniently analyzed. But Professor Martin Grodzins of the University of Chicago has gone to describe federalism in practice as more like a marble cake, with an intermingling of functions, than like a layer cake, with functions separate and distinct. The intermingling can be seen best, perhaps, by examining the example of railroad traffic. If it crosses a state line, it constitutes interstate commerce, coming under control of national government. Rail shipments originating and ending within a single state constitute intrastate commerce, thus—the theory tells us—falling under regulation of state government. However, both the interstate and intrastate shipments may have moved over the same rails. In this simple example, one might easily read the urgent necessity for close cooperation between state and national governments. This need has not gone unrecognized by administrators of governmental programs at the state, local, and national levels. Nonetheless, national and state interests often conflict in the political area. Pressures may be brought to bear down on state legislators which differ from those felt by members of the national Congress. Disagreement over the proper division of powers between states and the national government often lies beneath a conflict of interests. But no best formula has been discovered for drawing a dividing line between state powers and national powers. The men who wrote the United States Constitution did the best they could in the face of circumstances which confronted them at the time. The state-national power dispute has raged persistently ever since. What are "states rights"? It is obvious that, throughout the United States history, the issue of "states rights" has arisen repeatedly as the painful wailed for any interest which they felt being treated unsympathetically at a given moment by the national government. The source of the cry would seem to depend on whose ox is being gored.

单选题If you don't like to swim, you ______ stay at home.[A] should as well[B] may as well[C] can as well[D] would as well

单选题{{I}} Questions 11 to 13 are based on the following passage. At the and of the passage, you will be given 15 seconds to answer the questions. Now listen to the passage.{{/I}}

单选题No government, any more than an individual, will long be, without being truly ______.

单选题Although the national government has introduced some new laws on this subject, it is ______the state governments which are responsible for pollution control.A. preciselyB. primarilyC. progressivelyD. preliminarily

单选题When I picked up the phone, I didn't recognize it was Anne. Her voice sounded ______ on the phone.

单选题Which of the following is correct?A. Had you worked harder, you would have met the deadline.B. Have you worked harder, you would have met the deadline.C. If you worked harder, you would have met the deadline.D. If you have worked harder, you would have met the deadlin

单选题 When television is good, nothing—not the theatre, not the magazines, or newspapers—is better. But when television is bad, nothing is worse. I invite you to sit down in front of your television set when your station goes on the air and stay there without a book, magazine, newspaper, or anything else to distract you and keep your eyes glued to that set until the station signs off. I can assure you that you will observe a vast wasteland. You will see a procession of game shows, violence, audience participation shows, formula comedies about totally unbelievable families, mayhem, more violence, sadism, murder, Western bad men, Western good men, private eyes, gangsters, still more violence and cartoons. And, endlessly, commercials that scream and sweet-talk and offend. And most of all, boredom. True, you will see a few things you will enjoy. But they will be very, very few. And if you think I exaggerate, try it. Is there no room on television to teach, to inform, to uplift, to stretch, to enlarge the capacities of our children? Is there no room for a children's news show explaining something about the world for them at their level of understanding? Is there no room for reading the great literature of the past, teaching them the great traditions of freedom? There are some fine children's shows, but they are drowned out in the massive doses of cartoons, violence, and more violence. Search your conscience and see whether you cannot offer more to your young beneficiaries whose future you guard so many hours each and every day. There are many people in this great country, and you must serve all of us. You will get no argument from me if you say that, given a choice between a Western and a symphony, more people will watch the Western. I like Westerns and private eyes, too, but a steady diet for the whole country is obviously not in the public interest. We all know that people would more often prefer to be entertained rather than stimulated or informed. But your obligations are not satisfied if you look only to popularity as a test of what to broadcast. You are not only in show business: you are free to communicate ideas as well as give relaxation. You must provide a wider range of choices, more diversity, and more alternatives. It is not enough to cater to the nation's whims—you must also serve the nation's needs. The people own the air. They own it as much in prime evening time as they do at 6 o'clock in the morning. For every hour that the people give you, you owe them something. I intend to see that your debt is paid with service.

单选题 {{I}} Questions 24 and 25 are based on the following news. At the end of the news item, you will be given 10 seconds to answer the questions. Now listen to the news.{{/I}}

单选题 Questions 5 to 7 are based on the following conversation. At the end of the conversation, you will be given 15 seconds to answer the questions. Now listen to the conversation.

单选题Which of the following is NOT true about the findings of the polls?

单选题 Questions 14 to 17 are based on the following passage. At the end of the passage, you will be given 20 seconds to answer the questions. Now listen to the passage.

单选题 Questions 8 to 10 are based on the following conversation. At the end of the conversation, you will be given 15 seconds to answer the questions. Now, listen to the conversation.

单选题He thought he had lost his ______ for good. However, he found his pillow already taken by the dog when he entered the room.