单选题Japan is a______society of one nationality and a few underrepresented minority groups, such as the ethnic Chinese and Koreans.

单选题The number of stay-at-home fathers reached a record high last year, new figures show, as families saw a(n) ______ in female breadwinners. A. raise B. rise C. arise D. increase

单选题I prefer walking ( ).

单选题Not only the students but also the teacher ______ going to see the film. A. will B. are C. is D. has

单选题{{B}}练习五{{/B}} The American economic system is organized around a basically private-enterprise, market oriented economy in which consumers largely determine what shall be produced by spending their money in the marketplace for those goods and services that they want most. Private businessmen, striving to make their profits, produce these goods and services in competition with other businessmen: and the profit motive, operating under competitive pressures, largely determines how these goods and services are produced. Thus, in the American economic system it is the demand of individual consumers, coupled with the desire of businessmen to maximize profits and the desire of individuals to maximize their incomes, that together determine what shall be produced and how resources are used to produce it. An important factor in a market-oriented economy is the mechanism by which consumer demands can be expressed and responded to by producers. In the American economy, this mechanism is provided by a price system, a process in which prices rise and fall in response to relative demands of consumers and supplies offered by seller-producers. If the product is in short supply relative to the demand, the price will be a bit up and some consumers will be eliminated from the market. If, on the other hand, producing more of a commodity results in reducing its cost, this will tend to increase the supply offered by seller-producers, which in turn will lower the price and permit more consumers to buy the product. Thus, price is the regulating mechanism in the American economic system. The important factor in a private-oriented economy is that individuals are allowed to own productive resources (private property), and they are permitted to hire labor, gain control over natural resources, and produce goods and services for sale at a profit. In the American economy, the concept of private property embraces not only the ownership of productive resources but also certain rights, including the right to determine the price of a product or to make a free contract with another private individual.

单选题Rocket fuels are more explosive than methane gas because of ______.

单选题Watch out! Here comes London Mayor Boris Johnson riding a bicycle from his new bike hire plan. "What we've put in is a new form of public transport. These bikes are going to belong to everybody. " More than 12000 people have signed up for the plan. They each receive a key at a cost of three pounds, with costs at one pound for a 24-hour membership, five pounds for seven days, and 45 pounds for an annual membership. John Payne, a London teacher who cycles a lot, is among the first to use the system. "It's very comfortable. For people who don't cycle much I think it'll be very useful. But for people who cycle regularly, they are possibly a bit slow. But they're perfect for London streets, very strong. I think they'll be very widely used. " And Johnson says it's of good value. "I think it's extremely good value. The first half hour is free. If you cycle smart and you cycle around London--most journeys in London take less than half an hour, you can cycle the whole day free. " Some 5 000 bikes are currently available at over 300 docking stations (租车点) in central London. Johnson says the city will gradually expand the system, "Clearly one of our ambitions is to make sure that in 2012 when the world comes to London, they be able to use London hire bikes to go to the Olympic stadiums. /

单选题Forests are delicate systems that if disturbed can be permanently destroyed.

单选题The panel is made up of ______. A. scientists B. homeowners C. citizens D. factory, owners

单选题The apples were divided ______ according to the age and size of the children. A. equally B. approximately C. proportionately D. sufficiently

单选题"OK, there ______, it"s time for you to leave".

单选题{{B}}Part B{{/B}}Directions: In the following article, some sentences have been removed. For Questions 41-45, choose the most suitable one from the list A-G to fit into each of the numbered blanks. There are two extra choices, which do not fit in any of the blanks. Long before man lived on the Earth, there were fishes, reptiles, birds, insects, and some mammals. Although some of these animals were ancestors of kinds living today, others are now extinct, that is, they have no descendants alive now. Nevertheless, we know a great deal about many of them because their bones and shells have been preserved in the rocks as fossils. 41.______That kind of rock in which the remains are found tells us much about the nature of the original land, often of the plants that grew on it, and even of its climate. When an animal dies, the body, its bones, or shell, may often be carried away by streams into lakes or the sea and there get covered up by mud. If the animal lived in the sea its body would probably sink and be covered with mud. More and more mud would fall upon it until the bones or shell become embedded and preserved. 42．______Thus it follows that there must be many kinds of mammals, birds, and insects of which we know nothing, 43．______Later forms are more complex, and among these are the sea-lilies, relations of the star-fishes, which had long arms and were attached by a long stalk to the sea bed, or to rocks. There were also crab-like creatures, whose bodies were covered with a horny substance, The body segments each had two pairs of legs, one pair for walking on the sandy bottom, the other for swimming. The head was a kind of shield with a pair of compound eyes, often with thousands of lenses. They were usually an inch or two long but some were 2 feet. The shellfish have a long history in the rock and many different kinds are known. Of these, the ammonites are very interesting and important. They have a shell composed of many chambers, each representing a temporary home of the animal. As the young grew larger it grew a new chamber and sealed off the previous one. Thousands of these can be seen in the rocks on the Dorset Coast. The first animals with true backbones were fishes, first known in the rocks of 375 million years ago. About 300 million years ago the amphibians, the animals able to live both on land and in water, appeared. They were giant, sometimes 8 feet long, and many of them lived in the swampy pools in which our coal seam, or layer, formed. 44．______About 75 million years ago the Age of Reptiles was over and most of the groups died out. The mammals quickly developed, and we can trace the evolution of many familiar animals such as the elephant and horse. 45．______ [A] The best index fossils tend to be marine creatures. These animals evolved rapidly and spread over large areas of the world. [B] The amphibians gave rise to the reptiles and for nearly 150 million years these were the principal forms of life on land, in the sea, and in the air. [C] Many of the later mammals, though now extinct, were known to primitive man and were featured by him in cave paintings and on bone carvings. [D] Nearly all of the fossils that we know were preserved in rocks formed by water action, and most of these are of animals that lived in or near water. [E] The earliest animals whose remains have been found were all very simple kinds and lived in the sea. [F] Many factors can influence how fossils are preserved in rocks. Remains of an organism may be replaced by minerals, dissolved by an acidic solution to leave only their impression, or simply reduced to a more stable form. [G] From them we can tell their size and shape, how they walked, the kind of food they ate. Very occasionally the rocks show impression of skin, so that, apart from color, we can build up a reasonably accurate picture of an animal that died millions of years ago.

单选题Scarcely______asleep when a knock at the door awakened her.

单选题By November 1914 the government was forced to______that the policy had failed.

单选题______the assignments are turned in before the end of this week.