单选题What does the comment "This is logical" (Line 5) mean?

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单选题In a single moment, a good reader picks up ______.

单选题Disposing (处理) of waste has been a problem since humans started producing it. As more and more people choose to live close together in cities, the waste-disposal problem becomes increasingly difficult. During the eighteenth century, it was usual for several neighboring towns to get together to select a faraway spot as a dumpsite. Residents or trash haulers (垃圾托运者) would transport household rubbish, rotted wood, and old possessions to the site. Periodically (定期的) some of the trash was burned and the rest was buried. The unpleasant sights and smells caused no problem because nobody lived close by. Factories, mills, and other industrial sites also had waste to be disposed of. Those located on rivers often just dumped the unwanted remains into the water. Others built huge burners with chimneys to deal with the problem. Several facts make these choices unacceptable to modem society. The first problem is space. Dumps, which are now called landfills, are most needed in heavily populated areas. Such areas rarely have empty land suitable for this purpose. Property is either too expensive or too close to residential (住宅区的)neighborhoods Long-distance trash hauling has been a common practice, but once farm areas are refusing to accept rubbish from elsewhere, cheap land within trucking distance of major city areas is almost nonexistent. Awareness of pollution dangers has resulted in more strict rules of waste disposal. Pollution of rivers, ground water, land and air is a price people can no longer pay to get rid of waste. The amount of waste, however, continues to grow. Recycling efforts have become commonplace in recent years, and many towns require their people to take part. Even the most efficient recycling programs, however, can hope to deal with only about 50 percent of a city's reusable waste.

单选题{{I}}Questions 11～13 are based on the following dialogue between an employer and an employee.{{/I}}

单选题Mandy did her housework all ______. [A] by herself [B] by she self [C] herself

单选题It is expected that by 2010 new technology will have revolutionized communications and ______.

单选题Wheredoesthisconversationmostprobablytakeplace?A.Inalibrary.B.Inahospital.C.Atabank.D.Inastore.

单选题Whichflightwillthemantake?

单选题Questions 11-13 are based on a conversation between a woman and her neighbor.

单选题Which of the following best defines the word "peculiar" in Line 5 of the third paragraph?

单选题Whathashappened?

单选题{{B}}B{{/B}} The basic flag of the United States is one of the world's oldest national flags. Only the basic flags of Austria, Denmark, Great Britain, the Netherlands, Sweden, and Switzerland are older. During the discovery and settlement of what is now the United States, the flags of various European nations were flown over the land, as symbols of possession. Later, in the Colonial and Revolutionary War periods, flags representing famous persons, places, and events were flown in the American Colonies(殖民地). The first official flag of the United States was created by Congress(国会) on June 14,1777. It consisted of 13 alternate (交替的) red and white stripes (条) and 13 white stars in a field of blue, representing the 13 colonies that had declared their independence in 1776.

单选题Many scientists today are convinced that life exists elsewhere in the universe—life probably much like that on our own planet. They reason in the following way. As far as astronomers can determine, the entire universe is built of the same matter. They have no reason to doubt that matter obeys the same laws in every part of the universe. Therefore, it is reasonable to guess that other stars, with their own planets, were born in the same way as our own solar system. What we know of life on earth suggests that life will arise wherever the proper conditions exist. Life requires the right amount and kind of atmosphere. This eliminates all those planets in the universe that are not about the same size and weight as the earth. A smaller planet would lose its atmosphere, a larger one would hold too much of it. Life also required a steady supply of heat and light. This eliminates double stars, or stars that flare up suddenly. Only single stars that are steady sources of heat and light like our sun would qualify. Finally, life could evolve only if the planet is just the right distance from its sun. With a weaker sun than our own, the planet would have to be closer to it. With a stronger sun, it would have to be farther away. If we suppose that every star in the universe has a family of planets, then how many planets might support life? First, eliminate those stars that are not like our sun. Next, eliminate most of their planets, they are either too far from or too close to their suns. Then eliminate all those planets which are not the same size and weight as the earth. Finally, remember that the proper conditions do not necessarily mean that life actually does exist on a planet. It may not have begun yet, or it may have already died out. This process of elimination seems to leave very few planets on which earthlike life might be found. However, even if life could exist on only one planet in a million, there are so many billions of planets that this would still leave a vast number on which life could exist.

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单选题Whatwillthegirldotomorrow?[A]Haveapicnic.[B]Stayathomewithhermum.[C]Goshopping.