51. For results, we must seek from committee, and computerized direct mail appeals to Bill.
A. and computerized direct mail appeals to
B. and through computerized direct mail appeals to
提供者jessie1004 750备注：迷惑选项一个就是原题中的(哪个？)，不记得有没有逗号了。这个是最后一题了，没想明白。
→参考观点：楼主没有提供答案，不过偏向B，因为平行并列介词需要补出。有异议请跟帖。作者: myice 时间: 2010-6-23 23:17
52. … both … and …, yet doing something.
提供者jessie1004 750备注：yet 后面的动词是和主句的动词应该一致，因为都是主语发起的。
→参考观点：有待补充。作者: myice 时间: 2010-6-23 23:17
53. Through an experiment, a group of scientists announce that under the condition of Tibet – abnormal low temperature, humidity and air pressure, trees could not make seedling establishment more than in lower sea level’s condition.
提供者备注1234567x 750：科学家经过某实验，认为在如下环境中：_ temperature, _ 和 _ 导致树不能seedling establishment more than某环境（或某地区）。选项我记得是选了一个有分号“；”的，非常不确定。
→参考观点：继破折号之后又出现分号的用法啦。(原题中黄色部分为方便各位思考而后来添的，看的时候请不要记这些)
Prep Notes补充：
1) 两个句子的连接必须用连词或者用分号，用逗号来连接两个句子只能是分句，不是主句。
2) 使用了分号，将长句分隔成了两个相对独立的分句，两分句不存在从属关系，属于同一层次的句子。
3) 如果采用分号（;），分号前后的两个分句都应该是独立完整的句子。如果句子不采用分号，则需要使用连词连接句子、或构成主从复合句形式、或划线部分为非句子结构。
4) 如果读题的时候读到分号为止依然没有发现划线部分，可以立刻忽略分句前半部分。作者: myice 时间: 2010-6-23 23:17
54. … are … and …
A. are … and
B. are … and are
C. were … and were
D. were … and
E. were …; were
提供者ryanwang备注：一个考复数的东西。到时候注意看。
→参考观点：完全看不出答案，属酱油题。不过其实题目主考时态和平行问题，请根据实际情况作答。作者: myice 时间: 2010-6-23 23:17
55. By 1999, astronomers had discovered 17 moons that are orbiting by Jupiter.
A. astronomers had discovered 17 moons that are orbiting
B. astronomers discovered 17 moons that are orbiting
C. astronomers have discovered 17 stars orbiting
提供者canols 780备注：By 1999, astronomers(还是scientists) had discovered 17 stars that are orbiting by xx planets. 这道题的考点是A过去完成时VS现在完成时；B discover something (vs) that xx, 选项有have discovered that 17 stars xxx的。
→参考观点：主要考时态，by 1999是关键，首先1999是过去时，另外一个by使得句子适合完成时态。(题目中黄色部分为方便各位思考而后来添的，看的时候请不要记这些)作者: myice 时间: 2010-6-23 23:18
56. As compared to the palm tree, the baobab can stretch its root with a maximum 10 metres in length and 5 metres in width to absorb adequate water, and can virtually envelop a big tree.
A. As compared to the palm tree, the baobab can stretch its root with a maximum 10 metres in length and 5 metres in width to absorb adequate water, and can virtually envelop
B. Unlike the palm tree, the baobab can stretch its root with a maximum 10 metres in length and 5 metres in width to absorb adequate water, and virtually envelop
提供者canols 780备注：我在有两个选项要区分有没有can的，说什么东西can develop还是什么动词的root 长和宽达到多少and can virtually envelop a big tree什么的，选项中有can virtually vs. virtually (就是没有can)，然后后面有unlike vs. as compared to 我最后选了个没有can的，因为觉得can和virtually有点矛盾，而unlike和as compared to都是对的。
→参考观点：暂时以楼主为准。(题目中黄色部分为方便各位思考而后来添的，看的时候请不要记这些)作者: myice 时间: 2010-6-23 23:18
57. Unlike vertebrate, the moth grows up, morphs step by step, and produces a brand new one.
A. grows up, morphs step by step, and produces a brand new one
B. grows up, morphing step by step, and producing a brand new one
提供者bearwinnie备注：这里有三个动词就是 v. ,蜕变,produce , 到底是蜕变和produce 要不要加’ing’。
→参考观点：在客观事实都符合的情况下，忠实原文吧，原文是三个并列那就并列。如果不符那么要按照实际情况。作者: myice 时间: 2010-6-23 23:19
1. Unlike vertebrate, the moth grows up, morphs step by step, and produces a brand new one.
A. grows up, morphs step by step, and produces a brand new one
B. grows up, morphing step by step, and producing a brand new one
提供者bearwinnie备注：这里有三个动词就是 v. ,蜕变,produce , 到底是蜕变和produce 要不要加’ing’。
→参考观点：在客观事实都符合的情况下，忠实原文吧，原文是三个并列那就并列。如果不符那么要按照实际情况。
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