请问老师这个怎么只凭A就能算出来呀？

Pensions are now viewed as a deferred payment of salary, money ( a worker is compelled to put away to take care of one's ) later years. A. a worker is compelled to put away to take care of one's B. that a worker is compelled to put away to take care of oneself in C. a worker is compelled to put away to take care of oneself in D. workers are compelled to put away to take care of them in E. workers are compelled to put away to take care of themselves in 这道题做对了，选E。但是做题过程不对，take care of后面应该是反身代词，所以A D排除，B C E的区别是单复数，不知道突破口在哪，只是感觉如果B对，C肯定也对，that应该可有可无，不足以影响对错，所以选了E。其实这道题不太明白，麻烦老师讲解。

Many investors base their choice ( between bonds and stocks on comparing bond yields to ) the dividends available on common stocks. A. between bonds and stocks on comparing bond yields to B. among bonds and stocks on comparisons of bond yields to C. between bonds and stocks on comparisons of bond yields with D. among bonds and stocks on comparing bond yields and E. between bonds and stocks on comparing bond yields with 选项明显的差距就是between and以及compare with，所以选了E，答案是C。麻烦老师讲解一下comparing和comparisons of的区别。

( The rising of costs ) of data-processing operations at many financial insititutions has created a growing opportunity for independent companies to provide these services more efficiently and at lower cost. A. The rising of costs B. Rising costs C. The rising cost D. Because the rising cost E. Because of rising cost D E 没有主语，排除。谓语是单数，B 排除。A是成本的上升，C是上升的成本，句意是创造了更多的机会去提供服务。感觉意思都说的过去，纠结好久。答案是C。做题时没有关注到后面的 at lower cost，不知道这里和前面的cost有没有关系，是否可以根据这里把A排除？麻烦老师讲解。

In December of 1987 an automobile manufacturer pleaded no contest to criminal charges of odometer tampering and agreed to pay more than $16 million in civil damages for ( cars that were test-driven with their odometers disconnected ). A. Cars that were test-driven with their odometers disconnected B. Cars that it had test-driven with disconnected odometers C. Its cars having been test-driven with disconnected odometers D. Having test-driven cars with their odometers disconnected E. Having cars that were test-driven with disconnected odometers 一遍下来读的不太懂，大致是汽车公司对O T的违法赔偿不作辩护并且同意支付多少钱关于被测试过O D 的车。 B C的代词不对，排除。看到D E直接就排除了，不懂想要表达什么，选了A。答案是D。麻烦老师讲解。

看不懂正确b选项中，“one arm is lost it is quickly replaced”里it 指代什么。

Because an oversupply of computer chips has sent prices plunging, the manufacturer has announced that it will cut production by closing its factories for two days a month. A.Because an oversupply of computer chips has sent prices plunging, B.Because of plunging prices for computer chips, which is due to an oversupply, C.Because computer chip prices have been sent plunging, which resulted from an oversupply, D.Due to plunging computer chip prices from an oversupply, E.Due to an oversupply, with the result that computer chip prices have been sent plunging,

Most of the world's supply of uranium currently comes from mines. It is possible to extract uranium from seawater, but the cost of doing so is greater than the price that uranium fetches on the world market. Therefore, until the cost of extracting uranium from seawater can somehow be reduced, this method of obtaining uranium is unlikely to be commercially viable. Which of the following would it be most useful to determine in evaluating the argument? A.Whether the uranium in deposits on land is rapidly being depleted B.Whether most uranium is used near where it is mined C.Whether there are any technological advances that show promise of reducing the cost of extracting uranium from seawater D.Whether the total amount of uranium in seawater is significantly greater than the total amount of uranium on land E.Whether uranium can be extracted from freshwater at a cost similar to the cost of extracting it from seawater

Rising inventories, when unaccompanied correspondingly by increases in sales, can lead to production cutbacks that would hamper economic growth. (A) when unaccompanied correspondingly by increases in sales, can lead (B) when not accompanied by corresponding increases in sales, possibly leads (C) when they were unaccompanied by corresponding sales increases, can lead (D) if not accompanied by correspondingly increased sales, possibly leads (E) if not accompanied by corresponding increases in sales, can lead 1. 为什么OG解释说用when是needlessly difficult to understand，when比if好在哪里 2. OG，解释说 adverb correspondingly is incorrectly and ambiguously used，为什么 correspondingly 是 ambiguously used？

In late 1997, the chambers inside the pyramid of the Pharaoh Menkaure at Giza were closed to visitors for cleaning and repair due to moisture exhaled bv tourists, which raised its humidity to such levels so that salt from the stone was crystallizing and fungus was growing on the walls. (A) due to moisture exhaled by tourists, which raised its humidity to such levels so that salt from the stone was crystallizing (B) due to moisture that tourists had exhaled, thereby raising its humidity to such levels that salt from the stone would crystallize (C) because tourists were exhaling moisture, which had raised the humidity within them to levels such that salt from the stone would crystallize (D) because of moisture that was exhaled by tourists raising the humidity within them to levels so high as to make the salt from the stone crystallize (E) because moisture exhaled by tourists had raised the humidity within them to such levels that salt from the stone was crystallizing 这题OG的解释： 为什么 them 在 D选项 中是指代tourists ，但是在 E选项 中them又是正确地指代了chambers？

这道题正确答案是 B， 我一直觉得是D, 不是特别明白 B 答案为什么 说as effectively as sea snakes can? One such adaptation is the closer proximity of the terrestrial snake's heart to its head, which helps to ensure circulation to the brain, regardless of the snake's orientation in space. The heart of sea snakes can be located near the middle of the body, a position that minimizes the work entailed in circulating blood to both extremities. In arboreal snakes, however, which dwell in trees and often assume a vertical posture, the average distance from the heart to the head can be as little as 15 percent of overall body length. Such a location requires that blood circulated to the tail of the snake travel a greater distance back to the heart, a problem solved by another adaptation. 20. It can be inferred from the passage that which of the following is true of species of terrestrial snakes that often need to assume a vertical posture? (A) They are more likely to be susceptible to circulatory failure in vertical postures than are sea snakes. (B) Their hearts are less likely to be located at the midpoint of their bodies than is the case with sea snakes. (c) they cannot counteract the pooling of blood in lower regions of their bodies as effectively as sea snakes can. (d) the blood pressure at their midpoint decreases significantly when they are titled with their heads up.