请高手指点迷津呀,正在复习GWD的题目,感觉有点吃力,可是也正在慢慢适应.有很多时候,是因为自己不仔细思考题干所说的意思就匆匆忙忙开始做题，很没有效果.
1.Partly because of bad weather, but also partly because some major pepper growers have switched to high-priced cocoa, world production of pepper has been running well below worldwide sales for three years. Pepper is consequently in relatively short supply. The price of pepper has soared in response: it now equals that of cocoa.
Some observers have concluded that the rise in the price of pepper means that the switch by some growers from pepper to cocoa left those growers no better off that if none of them had switched; this conclusion, however, is unwarranted because it can be inferred to be likely that
(A) those growers could not have foreseen how high the price of pepper would go
(B) he initial cost involved in switching from pepper to cocoa is substantial
(C) supplies of pepper would not be as low as they are if those growers had not switched crops
(D) cocoa crops are as susceptible(容易受影响的) to being reduced by bad weather as are pepper crops
(E) as more growers turn to growing cocoa, cocoa supplies will increase and the price of cocoa will fall precipitously
Answer: C
对于黄线那句我不是很明白，“胡椒粉价格是上涨意味着农民转而种植可可粉。。。”后面我就弄不懂了，尤其是“no better off。。。”可能我断句有错误，请指教。
2. Federal agricultural programs aimed at benefiting one group whose livelihood depends on farming often end up harming another such group.
Which of the following statement provides support for the claim above?
I. An effort to help feed-grain producers resulted in higher prices for their crops, but the higher prices decreased the profits of livestock producers.
II. In order to reduce crop surpluses and increase prices, growers of certain crops were paid to leave a portion of their land idle, but the reduction was not achieved because improvements in efficiency resulted in hither production on the land in use.
III. Many farm workers were put out of work when a program meant to raise the price of grain provided grain growers with an incentive to reduce production by giving them surplus grain from government reserves.
Answer: I and III , but not II
联邦政府这样的农业政策是有利于一类人，这类人的生存依靠于种植，“often end up harming another such group”这句话就翻译不下去，难道是理解成“种植最后会因为土地的原因伤害了另一类人的生存？”感觉怪怪的。
3 Archaeologists seeking the location of a legendary siege and destruction of a city are excavating in several possible places, including a middle and a lower layer of a large mound. The bottom of the middle layer contains some pieces of pottery of type 3, known to be from a later period than the time of the destruction of the city, but the lower layer does not.
Which of the following hypotheses is best supported by the evidence above?
Answer: The middle layer does not represent the period of the siege.
The force of the evidence cited above is most seriously weakened if which of the following is true?
Answer: Gerbils, small animals long native to the area, dig large burrows into which objects can fall when the burrows collapse.
我觉得我的问题是，由于生词导致我对句子理解不清，“a人发现了些东西，通过这些东西，能了解城市毁损的时间，但是最低层次的就发现不了这些东西。。。”这就是我第一次看题时得出来的东西，破碎零散。不知道你们是怎么样的。
哪位能解释下吗?我的确不怎么懂.
没有人理耶,哪位好心人,能帮我解释下....
Some observers have concluded that the rise in the price of pepper means that the switch by some growers from pepper to cocoa left those growers no better off that if none of them had switched;
一些观察家得出结论认为pepper现在上涨的价格意味着：这种由种植者耕种pepper转到种cocoa的改变并未给那些种植者来说带来比‘如果他们都不做那样改变来说’更好的结果。
Federal agricultural programs aimed at benefiting one group whose livelihood depends on farming
often end up harming another such group.
Archaeologists seeking the location of a legendary siege and destruction of a city are excavating in several possible places, including a middle and a lower layer of a large mound. The bottom of the middle layer contains some pieces of pottery of type 3, known to be from a later period than the time of the destruction of the city, but the lower layer does not.
考古人员找一个城市的古迹，其中有中层和底层的土，中层的土包括了一种物质，这种物质被认为是比城市毁灭的时间要晚，但是下层土不包括
所以得出的结论是
中层的土不是城市被毁坏和围困时期的土
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