考研英语冲刺：五招搞定完形填空7选5题 (5)
［D］ The best index fossils tend to be marine creatures. These animals evolved rapidly and spread over large over large areas of the world。
［E］ The earliest animals whose remains have been found were all very simple kinds and lived in the sea. Later forms are more complex, and among these are the sealilies, relations of the starfishes, which had long arms and were attached by a long stalk to the sea bed, or to rocks。
［F］ 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。
［G］ 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。
【解析】［A］ 下文一开始就出现了指示代词these，这说明试题前面的句子表明了一类事物，也就是说，试题部分应该有“some, several, many”或类似的词，对比答案只能是选项［A］ The shellfish have a long history in the rock and many different kinds are known.［A］里面出现了many different kinds of，这个短语和后面的指示代词these形成了对应关系。
4)数字线索
包括具体数字以及和数字相关的词汇诸如ratio, rate等等。作者列出数字，除了和其他数字进行对比和比较之外，还可以用数据来说明一个观点。
例1(2006年真题)
He visited the casino, lost the $20 and left. On his second visit he lost $800. The casino issued to him, as a good customer, a “Fun Card”， which when used in the casino earns points for meals and drinks, and enables the casino to track the user’s gambling activities. For Williams, these activities become what he calls electronic morphine。
41 In 1997 he lost $21,000 to one slot machine in two days. In March 1997 he lost $72,186. He sometimes played two slot machines at a time, all night, until the boat docked at 5 a.m., then went back aboard when the casino opened at 9 a.m. Now he is suing the casino, charging that it should have refused his patronage because it knew he was addicted. It did know he had a problem。
［A］ Although no such evidence was presented, the casino’s marketing department continued to pepper him with mailings. And he entered the casino and used his Fun Card without being detected。
［B］ It is unclear what luring was required, given his compulsive behavior. And in what sense was his will operative?
［C］ By the time he had lost $5,000 he said to himself that if he could get back to even, he would quit. One night he won $5,500, but he did not quit。
［D］ Gambling has been a common feature of American life forever, but for a long time it was broadly considered a sin, or a social disease. Now it is a social policy: the most important and aggressive promoter of gambling in America is government。
［E］ David Williams’s suit should trouble this gambling nation. But don’t bet on it。
［F］ It is worrisome that society is medicalizing more and more behavioral problems, often defining as addictions what earlier, sterner generations explained as weakness of will。
［G］ The anonymous, lonely, undistracted nature of online gambling is especially conductive to compulsive behavior. But even if the government knew how to move against Internet gambling, what would be its grounds for doing so?
【解析】［C］从前后文表达的语义来看，前文的第一句话表明了本段的主题He visited the casino, lost the $20 and left。试题后面的句子是In 1997 he lost $21,000 to one slot machine in two days，两者的侧重点都集中在lost(输钱)上，同是前后文中都出现了一些数字加以说明，因此从语义上判断，要填入的内容一定和此人输钱有关，同时选项中很可能会出现数字。对比选项，选项［C］中出现了$5,000和$5，500和前后文的数字形成照应，由于其他选项中没有任何数字，考生应该很快能看出这个答案。此外，从语义逻辑上看，试题所在的选项句和试题后面的一句其实是用具体的事实数据在描述David Williams的赌瘾越来越大，两者的语义逻辑表达方向一致，因此选项［C］是正确答案。
5)逻辑关系线索
(a)并列与递进关系： and, or, also，neither…nor…,either…or…,likewise, similarly, equally, in the same way, that is to say ,as well as, the same …as,besides, additionally, furthermore, moreover, in addition to ,what is more
例(大纲样题)
43 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。
［A］ The shellfish have a long history in the rock and many different kinds are known。
［B］ Nevertheless, we know a great deal about many of them because their bones and shells have been preserved in the rocks as fossils, From them we can tell their size and shape, how they walked, the kind of food they ate。
［C］ The first animals with true backbones were the 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. 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。
［D］ The best index fossils tend to be marine creatures. These animals evolved rapidly and spread over large over large areas of the world。
［E］ The earliest animals whose remains have been found were all very simple kinds and lived in the sea. 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。
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