单选题A word processor is much better than a typewriter in that it enables you to enter and ______ your text more easily.

单选题I thought his speech would be interesting, but it turned out that the more he talked, ______.

单选题Dr. Black comes from either Oxford or Cambridge. I can"t remember ______.

单选题In the earliest stages of man"s development he had no more need of money than animals have. He was content with very simple forms of shelter, made his own rough tools and weapons and provided food and clothing for him and his family from natural materials around him. As he became more civilized, however, he began to want better shelter, more efficient tools and weapons, and more comfortable and lasting clothing than could be provided by his own neighborhood or by the work of his own unskilled hands. For these things he had to turn to the skilled people such as smiths, leather workers or carpenters who were springing up everywhere. It was then that the questions of payment arose. At first he got what he wanted by a simple process of exchange. The smith who had not the time to look after land or cattle was glad to take meat or grain from the farmer in exchange for an ax or a plough. But as more and more goods which had not fixed exchange value came on the market, exchange became too complicated to be satisfactory. Another problem arose when those who made things wanted to get stocks of wood or leather, or iron, but had nothing to offer in exchange until their finished goods were ready. Thus the difficulties of exchange led by degrees to the invention of money. In some countries, easily handled things like seeds or shells were given a certain value and the farmer, instead of paying the smith for a new ax by giving him some meat or grain, gave him so many shells. If the smith had any shells left when he had bought his food, he could get stocks of the raw materials of his trade. In some countries quite large things such as cows or camels or even big flat stones were used for trade. Later, pieces of metal, bearing values according to the rarity of the metal and the size of the pieces, or coins were used. Money as we know it had arrived.

单选题Jones seldom wakes up at six in the morning, ______?

单选题Throughout life, human beings take air into their lungs about 20 times a minute.

单选题Movie stars never fail to stir people, especially those young.

单选题He ______ English for 8 years by the time he graduates from the university next year.

单选题Liz won"t be at work next week—______ a well-earned break.

单选题His efforts to raise money for his program were ______ because no one showed any intention to take a cent out of their pockets.

单选题The scientists wanted to keep people ______ about the breakthrough in their experiment.

单选题To speed up the ______ of letters, the Post Office introduced automatic sorting.

单选题The amount of water used in the manufacturing process is enormous, but the amount wasted is ______.

单选题The number of members in the club ______ to two hundred.

单选题Sandy planned to take computer as her ______.

单选题Man has always wanted to fly. Some of the greatest men in history had thought about the problem. One of them, for example, was the great Italian artist, Leonardo Da Vinci. In the sixteenth century he made designs for machines that would fly, but they were never built. Throughout history, other less famous men had wanted to fly. An example was a man in England 800 years ago. He made a pair of wings from chicken feathers. Then he fixed them to his body and jumped into air from a tall building. He did not fly very far. Instead, he fell to the ground and broke every bone in his body. The first real steps took place in France, in 1783. Two brothers, the Montgolfiers, made a very large "hot air balloon". They knew that hot air rises. Why not fill a balloon with it? The balloon was made of cloth and paper. In September of that year, the King and Queen of France came to see the balloon. They watched it carry the very first air passengers into the sky. The passengers were a sheep and a chicken. We do not know how they felt about the trip. But we do know that the trip lasted eight minutes and that the animals landed safely. Two months later, two men did the same thing. They rose above Paris in a balloon of the same kind. Their trip lasted twenty-five minutes and they traveled about.

单选题When it comes to ______, I know nothing.

单选题______ the meeting himself gave his supporters a great deal of encouragement.

单选题She is often seen ______ in the library on Saturday morning. A. to read B. was reading C. reading D. reads

单选题Actually, information technology can ______ the gap between the poor and the rich.