单选题If your mother wants to tell you something, she uses 1 . Birds can not 2 as we do. But some birds can make sounds to 3 their young of danger. They have their own 4 to make the young birds do 5 things. The jackdaw(寒鸦)is a kind of blackbird that 6 in Europe. Jackdaws live together 7 flocks (群). Young jackdaws do not know their 8 When an older jackdaw 9 a dog, it makes a 10 rattling (咯咯响的)sound. The younger birds know this sound means an enemy is 11 . The sound warns them and 12 them to know their enemies. If a young jackdaw is in a 13 place, a jackdaw parent flies 14 him from behind. The parent bird flies low over the young birds back. The parents tail feathers move quickly from side 15 side. It is trying to say," 16 me." At the same time, the parent calls 17 , "Key-aw, key-aw." The parents means, "Fly 18 with me." The young bird then follows the older one home. Young jackdaws do not have to learn 19 certain sounds mean. They know the 20 of these sounds from the time they hatch.

单选题Which state laid claim to the largest lan&holdings?

单选题It was about 600 years ______ the first clock with a face and hour hand was made.[A] that[B] until[C] before[D] since

单选题Old Reese became angry because ____________.

单选题

单选题Howlongisbegoingtostay?

单选题What is the woman looking for?

单选题One of the qualities that most people admire in others is the willingness to admit one's mistakes. It is extremely hard sometimes to say a simple thing like "I was wrong about that," and it is even harder to say, "I was wrong, and you were right about that. " I had an experience recently with someone admitting to me that he had made a mistake fifteen years ago. He told me he had been the manager of a certain grocery store in the neighborhood where I grew up, and he asked me if I remembered the egg cartons. Then he related an incident and I began to remember vaguely the incident he was describing. I was about eight years old at the time, and I had gone into the store with my mother to do the weekly grocery shopping. On that particular day, I must have found my way to the dairy food department where the incident took place. There must have been a special sale on eggs that day because there was an impressive display of eggs in dozen and half-dozen cartons. The cartons were stacked three or four feet high. I must have stopped in front of a display to admire the stacks. Just then a woman came by pushing her grocery cart and knocked off the stacks of cartons. For some reason, I decided it was up to me to put the display back together, so I went to work. The manager heard the mouse and came rushing over to see what had happened. When he appeared, I was on my knees inspecting some of the cartons to see if any of the eggs were broken, but to him it looked as though I was the culprit. He severely reprimanded me and wanted me to pay for any broken eggs. I protested my innocence and tried to explain, but it did no good. Even though I quickly forgot all about the incident, apparently the manager did not.

单选题You ______ him out though you were very busy.

单选题His parents wouldn't let him marry anyone ______ family was poor. A. of whom B. whom C. of whose D. whose

单选题If you want to use Windows 2000, but your computer only has 64 MB, what will you have to do?

单选题There are several______ near the high school.

单选题Turner almost ______ that he hadn't told him that bad news, but all was too late.

单选题Where'sGeorgegoingprobably?

单选题听下面5段对话。每段对话后有一个小题，从题中所给的A、B、C三个选项中选出最佳选项，并标在试卷的相应位置。听完每段对话后，你都有10秒钟的时间来回答有关小题和阅读下一小题。每段对话仅读一遍。

单选题—Dear me! I've been in America for a month. —______you are settled, why don't you take up some serious study?[A] If[B] Now that[C] When[D] Even if

单选题Ann Curry is a famous news presenter of the NBC News "Today" show. When she was 15 she happened to walk into a bookstore in her hometown and began looking at the books on the shelves. The man behind the counter, Mac McCarley, asked if she'd like a job. She needed to start saving for college, so she said yes. Ann worked after school and during summer vacations, and the job helped pay for her first year of college. During college she would do many other jobs: she served coffee in the student union, was a hotel maid and even made maps for the US Forest Service. But selling books was one of the most satisfying jobs. One day a woman came into the bookstore and asked Arm for books on cancer (癌症). The woman seemed anxious. Ann showed her practically everything they had and found other books they could order. The woman left the store less worried, and Arm has always remembered the pride she felt in having helped her customer. Years later, as a television reporter in Los Angeles, Ann heard about a child who was born with problems with his fingers and his hand. His family could not afford a surgical(外科的) operation, and the boy lived in shame, hiding his hand in his pocket all the time. Ann persuaded her boss to let her do the story. After the story was broadcast, a doctor and a nurse called, offering to perform the surgical operation for free. Ann visited the boy in the recovery room after the operation. The first thing he did was to hold up his repaired hand and say, "Thank you. " What a sweet sense of satisfaction Ann Curry felt! At McCarley's bookstore, Ann always sensed she was working for the customers, not the store. Today it's the same. NBC News pays her, but she feels as if she works for the people who watch the programmes, helping them make sense of the world.

单选题______ may be used for ______ our eyes from the sunshine. [A] Sunglasses; protect [B] Sunglass; protecting [C] Sunglasses; protecting

单选题Villages in developing countries often lack many things. Books, clean water, electricity. These shortages are 1 to 2 But a 3 kind of shortage is not easy to see. That is a shortage of 4 Many villages have no doctors, engineers or scientists. They have no one who knows 5 to treat unusual medical problems or design a new expert system. There"s a way to ease these problems. They can do it with 6 . In the past few years, computer scientists around the world 7 8 they call expert systems. An expert system is a special kind of computer program. In some 9 , it can take the place of a human expert. For example, an expert in 10 system can help 11 a sick person. A question appears on the computer screen, "Is the person hot"? You tell the computer either yes or no. The computer asks 12 questions. "Has the person lost any blood"? "Can the person move normally"? You 13 The computer continues to ask questions 14 it has enough 15 to make a decision. Then it tells what 16 or other treatment is needed. In this way the expert system takes the place of a 17 Another kind of expert system takes the place of an engineer. It 18 the flow of water in a river. It tells if a dam can be built 19 the river. It also tells 20 electricity can be produced. Still other kinds of expert systems help solve problems for farmers and owners of small businesses.