单选题{{B}}B{{/B}} Life on land probably began about 430 million years ago, though it has existed in the water for perhaps much as 3 000 million years. When we think of the first life on land, we probably think of strange animals coming out of the oceans, but, in fact, no animals could have been living if plants had not been on land first. Plants had to be on land before animals arrived. They supplied the first land animals with the surrounding and food necessary, since the plants are the only form of life that is able to get and store energy. The first plants to exist out of the water were probably certain kinds of algae (海藻) which were followed by other plants that grew close to the ground and needed water in which to reproduce. Once their move to land had been made, however, evolution (进化) took place quickly. By the end of 100 million years, plants had developed their roots (根), and some had got tree-like forms since height was very important in gaining sunlight. About 300 million years ago, much of the world was covered with forests of huge trees. In most ways they were like modem trees. They had roots, leaves, wood, but mostly they had not developed seeds.

单选题Reading is not the only way to gain knowledge of the work in the past. There is another large. reservoir which may be called experience, and the college students will find, that every craftsman (工匠) has something he can teach and will generally teach gladly any college student who does not look down upon them. The information from them differs from that in textbooks and papers chiefly in that its theoretical part—the explanations of why things happen, is frequently quite fantastic. But the demonstration (示范) and report of what happens, and how it happens are correct even if the reports are in completely unscientific terms. Presently the college students will learn, in this case also, what to accept and what to reject. One important thing for a college student to remember is that if Aristotle could talk to the fisherman, so can he. Another source of knowledge is the vast store of traditional practices handed down from father to son, or mother to daughter, of old country customs, of folklore (风俗). All this is very difficult for a college student to examine, for much knowledge and personal experience is needed here to separate good plants from wild grass. The college students should learn to realize and remember how much of real value science has found in this wide and confused wilderness and how long scientific discoveries of what had existed in this area long.

单选题The new factory produces cars______ the rate of 500 a week.

单选题It"s a long time since he left his hometown, ______

单选题According to the text, it is _______ for a good soldier to run away from battle though not well-paid.

单选题Death at last ______the woman patient from her pain. A. got rid of B. relieved C. released D. left out

单选题The winner told me that the money was given to a children's hospital.[A] winning[B] to win[C] won[D] to be won

单选题Convenient, nutritious, cheap and available year round, carrots are not just for rabbits. But the Easter Bunny would certainly approve of a carrot dish as part of a holiday meal. Because of their natural sweetness, carrots have long been part of the dessert menu as well as the salad bar. In the Middle Ages, carrots were used in sweet cakes and other desserts. They are still used in sweets in the Middle East and Asia, and are often preserved in jams. In California, carrot juice is popular. Carrots were first cultivated in central Asia and the Middle East, and used as a medicine rather than as a vegetable. But carrots weren't always orange. In the 10th century, they were white or purple. The Dutch developed orange carrots in the 1600s. Carrots are a great convenience food. They're inexpensive and available year round. And even children who won't touch other vegetables eat carrots. Choose carrots with a bright, even color and smooth skin. Avoid limp(萎蔫的) ones, which are past their prime. Pick medium-sized carrots, which are sweeter and more flavorful than small ones, and more tender than larger, more mature carrots. Before storing, cut off any greens, since they can absorb moisture. Avoid storing carrots near apples, which emit a gas that can give carrots a bitter taste.

单选题It happened to rain heavily ______ the morning of our marriage.

单选题—Listen, Tom, I am not coming tonight.—But you ______!

单选题—The educational system rather than the teachers ______ to answer for the overburden on the students.—I agree. I hope the reform being carried out in our country at present will bring about the______results.

单选题She ______ many ways to lose weight, since she became a little bit plump. A. tried B. had tried C. has tried D. tries

单选题I couldn"t help ______ sorry for her. Her mother died when she was three.

单选题{{B}}B{{/B}} Michele Langlois is a young Canadian who works for the police as a handwriting expert. She has helped catch many criminals by using her special skill. When she was only 14, Michele was already so interested in the differences in her school friends' handwriting that she would spend hours studying them. After finishing college she went to France for a special two-year class to learn how to analyze handwriting at the School of Police Science. On her return, she began her work for the Quebec police. Michele says that it is impossible for people to disguise their handwriting. She can discover most of what she needs to know simply by looking at the writing with her own eyes, but she also has machines that help her analyze different kinds of paper and ink. This knowledge is often of help to the police. Michele also believes that handwriting is a good sign of the kind of person the writer is. "I wouldn't go out with a fellow ff I didn't like his handwriting, "she says. But she adds that she fell in love with her future husband, William Smith, before she studied his handwriting. It later proved to be all right, however.

单选题"Do you want to go out this evening?"______."

单选题—Tom, you make bed before breakfast, ______ —All right, mum.

单选题--You seem to have known all about the accident.-- ______.