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文章的第二、三自然段的主题句分别如下：

4. A bag contains only two types of coins. The total value of the 30 coins in the bag is $6. Of the 30 coins, x coins are worth $0.10 each and y coins are worth $0.25 each. If there are no other coins in the bag, which of the following systems of equations can be solved to find the number of each type of coin in the bag?

Assignment: what do you think of the idea that a person's worth is based on how much he or she produces? Is this an accurate scale for measuring worth or should we use different criteria to make this judgement? Plan and write an essay in which you develop your point of view on this issue. Suppport your position with reasoning and examples taken from your reading, studies, experience, or observation.

话题是关于美国黑人选举权利。在这些题目中，有如下问题都涉及到主旨、观点、态度的考察.

S＝｛6,12,18,24,30,36,42,48},T＝{8,16,24,32,40,48}，

同时，这些作文有的以叙述见长，有的以说理见长，但都显示了作者缜密的思维和令人信服的说理方式。

be the median of the new list of seven numbers?

A和B是用90年代的hockey fans和50、60年代作比较，二者不可比。

这套丛书的出版，要感谢上海译文出版社的热情鼓励，他们决心要打造中国第一套系统阐述SAT的经典丛书，使笔者笔耕不辍有了巨大的动力。感谢我历年来亲手带过的SAT学子们，他们的许多宝贵建议和想法都已被融入进了这套丛书。更要感谢各位同学对笔者的信任，我由衷希望这套丛书会成为你们冲击美国名校之路上的良师益友。

(C)instead of one on holding two tastings per year and to increase

第一步是审题

is disorganized or unfocused, resulting in a disjointed or incoherent essay

1,－2,3,－4,5,－6,...

前n项和公式为sn=<图>。

contains pervasive errors in grammar, usage, or mechanics that persistently interfere with meaning

It was that year that my mind opened and I began to truly become educated. Rather than trying to fill my head with disconnected facts and other people's ideas, I now collect knowledge that I can use to form or change my opinions. And I plan to continue this my whole life, facing new situations with an educated, open mind.

分析：假设4人桌有x张，则5人桌有19－x张。由题意，4x＋5（19－x）＝84，解得x＝11，选D。

作文的结尾叫Conclusion Paragraph。

E的问题同B，而且it指代不清楚。当然，D和E都改变了原句的意思。

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