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Scientists have dated sharp-edged flakes of stone found in the fine-grained sediments of a dry riverbed in the Afar region of Ethiopia to between 2.52 and 2.60 million years ago, pushing back by more than 150,000 years the earliest date when it is known that humans made stone tools.
Awhen it is known that humans made&&Bat which it is known that humans had made&&Cat which humans are known to have made&&Dthat humans are known to be making&&Eof humans who were known to make&&
正确答案: C
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新PREP1-256，求助
Scientists have dated sharp-edged flakes of stone found in the fine-grained sediments of a dry riverbed in the Afar region of Ethiopia to between 2.52 and 2.60 million years ago, pushing back by more than 150,000 years the earliest date when it is known that humans made stone tools.A. when it is known that humans madeB.it is known that humans had madeC. D. that humans are known to be makingE. of humans who were known to make
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这是一道gwd争议题呀~不过我忘了是哪一套上的题。。。
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其实，由于修饰的是date，所以很容易排除A、D、E项，剩下B和C，排除B，罗嗦！“被知道人们已经开始使用stone tools的最早的日期”！用完成式完全解释的清啊！
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菜鸟问为什么修饰date就把when排除呢？我记得白勇语法里数date就是与when搭配用的呀？我记错了吗？谢谢。
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1.这道题需要一个定语从句修饰date，一般情况下我们用，the date (when/at which/that)+什么事情发生/什么人做了什么这里中间加上"it is known that"意思上就不通顺了,因为"it is known that"这种句型本身不是一个用来改定语从句的好材料。A和B就排除了。至于是when/at which/that，我拿不准是不是gmat有特别的要求，感觉一般都可以用的。D的话，这里没有正在进行的意思，所以making是不对的。E扭曲了意思，这里想说的是人类制造石器这件事情的时间，所以date的定语应该是一件事情，而不是humans。用完成时"to have made"表示一种动作发生在过去的意思。比如：A number of hurricanes are known to have impacted on Tuvalu during the nineteenth and twentieth centuries.Mongoloid descent and are known to have created an advanced civilization in the highlands of the Altai Mountains between 600 and 300 BC.
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谢谢松鼠GG啦
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Scientists have dated sharp-edged flakes of stone found in the fine-grained sediments of a dry riverbed in the Afar region of Ethiopia to between 2.52 and 2.60 million years ago, pushing back by more than 150,000 years the earliest date when it is known that humans made stone tools. A. when it is known that humans made B.it is known that humans had made C. D. that humans are known to be making E. of humans who were known to make 原句的earliest最高级修饰date强调时间点，所以使用at which由于when；A，B选项逻辑意思严重违背原句意思，A，B选项的意思是humans made stone tools被it is known的时间被push back...；原句是想说human are known to have made stone tools的时间被pushing back；过去已经发生的事情，现在被发现也是现在完成时使用的情况之一。原句的earliest最高级修饰date强调时间点，所以使用at which由于when；A，B选项逻辑意思严重违背原句意思，A，B选项的意思是humans made stone tools被it is known的时间被push back...；原句是想说human are known to have made stone tools的时间被pushing back；过去已经发生的事情，现在被发现也是现在完成时使用的情况之一。
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从逻辑的角度考虑：发现sediments把人类制造石器的历史往前推了more than 150,000 years,那时人类已经制造了石器了。
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虽然知道别的选选项有更错的地方但C的时态真是让我纠结半天，总感觉要么用过去时，要么用过去完成时。干嘛要用现在完成呢？希望NN解答下！！
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1.这道题需要一个定语从句修饰date，一般情况下我们用，the date (when/at which/that)+什么事情发生/什么人做了什么这里中间加上&it is known that&意思上就不通顺了,因为&it is known that&这种句型本身不是一个用来改定语从句的好材料。A和B就排除了。至于是when/at which/that，我拿不准是不是gmat有特别的要求，感觉一般都可以用的。D的话，这里没有正在进行的意思，所以making是不对的。E扭曲了意思，这里想说的是人类制造石器这件事情的时间，所以date的定语应该是一件事情，而不是humans。用完成时&to have made&表示一种动作发生在过去的意思。比如：A number of hurricanes are known to have impacted on Tuvalu during the nineteenth and twentieth centuries.Mongoloid descent and are known to have created an advanced civilization in the highlands of the Altai Mountains between 600 and 300 BC.-- by 会员 松鼠gg ( 8:28:00)
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怎么看到Prep的语法笔记里面有那么多题是带着GWD的题号呢？是有很多重复的题么？除了语法，别的部分会重复么？之前听说Prep模考的效果比较接近真实考试，所以想把Prep留到后面做。可是如果GWD的先做了，Prep的题不是很多都已经看到过了，就失去模考的意义了么？还有，Prep语法笔记是应该最后看的么？我是在职，所以看语法笔记可能需要一个星期才可以消化得了。那一般来说应该怎么安排GWD的模拟和Prep的模拟啊大家？实在不明白这几个之间怎么个先后顺序啊。求牛牛们指导！多谢！
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怎么没人理啊？版主帮忙回答以下哦。正在精心制定复习计划，觉得这个问题影响很大哦。多谢先！
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1，prep破解有07和08两个版本，SC一共几百道题，跟GWD重题并没有占太多。2，prep语法笔记是分项突破用的，当然不是留到最后面啦3，最后两三周是训练pace和模考，GWD就很适合，prep模拟软件也是用于模考的，安装一次可模考两套题。既然都是用于模拟的，你先用哪个由自己决定啦，只不过prep模拟的界面和操作是跟实战一样的，用GWD模拟则需要计时器，论坛有下载。
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先制定好计划，然后再贴出来，到时我再给点建议，好吗？
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LZ可以看下这个贴哈~~我觉得还是应该突破的时候看下语法prep的笔记吧~~
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和楼主有同样的困惑，目前在OG第一遍总结中，准备之后prep破解。题很多，别去记答案，去记考点练感觉。加油！
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多谢大家回复！版主，我把计划贴出来了，请指导！
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1，prep破解有07和08两个版本，SC一共几百道题，跟GWD重题并没有占太多。2，prep语法笔记是分项突破用的， ...
同意！& && && && && &
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新prep-232，求助！！！！！
232.&&&& (32872-!-item-!-188;#058&006915)&&&& (TTGWD4-Q1)&The Acoma and Hopi are probably the two oldest surviving Pueblo communities, both dating back at least a thousand years.A. both datingB. both of which have datedC. and each has datedD. and each one datingE. each one of which date答案是A，为甚啊？
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尝试着说一下。。。CDE肯定不对，each一般用于独立主格结构，不需要and引导，直接each+名词+修饰语（分词形容词那些）。B的话，原文没有标志用完成时的词，比如during那些的，根据自己做了这么长时间的语法，觉得用完成时的时候一定要看有没时间标志词，不能乱用&A是后置定语，修饰那两个communitues。不知道能不能帮到你
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date用现在完成时不合逻辑&& 现在完成时表示在过去某一时间点发生的动作延续至今&& 这里date显然没这个意思
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以下是引用cuishang11在 14:51:00的发言：date用现在完成时不合逻辑&& 现在完成时表示在过去某一时间点发生的动作延续至今&& 这里date显然没这个意思date 用现在完成时很合理啊Rock samples taken from the remains of an asteroid about twice the size of the 6-mile-wide asteroid that eradicated the dinosaurs has been dated to be 3.47 billion years old and thus is evidence of the earliest known asteroid impact on Earth.A. has been dated to be 3.47 billion years old and thus isB. has been dated at 3.47 billion years old and thusC. have been dated to be 3.47 billion years old and thus areD. have been dated as being 3.47 billion years old and thusE. have been dated at 3.47 billion years old and thus are这个题也是PREP上的一道题，答案是E啦，不就是用了完成时态嘛？？？求助ing
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date at与date back不同，一般date back的时间是从现在算起，故谓语动词多用一般现在时。另外句里也没有任何含义表明要用完成时态。[此贴子已经被作者于 8:14:01编辑过]
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The Acoma and Hopi are probably the two oldest surviving Pueblo communities, both dating back at least a thousand years.A. both datingB. both of which have datedC. and each has datedD. and each one datingE. each one of which dateBC均修饰最后一个名词Pueblo communities, two oldest surviving Pueblo communities说明除了这两个以外还有其他的Pueblo communities,而作者愿意是想修饰The Acoma and Hopi这两个Pueblo communities,用伴随状语就解决了这一歧义,至于D选项本身错,E each one of which典型修饰最后一个复数名词的句式
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&D E选项可不可以认为是each 和one语义重复了呢 ？
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each one没什么问题的。比如下面这个句子：大全191:In the shark's jaws, many spare teeth lie in seemingly limitless reserve, each one ready to slide into the appropriate position whenever an active tooth is lost or worn down.
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先指正一下2楼，each 独立主格不是 each+ 名词再+ 什么什么，而是each + doing/ done/ prep+n/ adj+prep+n/ n再说我的一点看法，我也错了这道题，后来分析的时候突然觉得，我们经常用each doing独立主格，而这里both dating其实不就是它的变体么？！both,each在这里都是限定词。请NN指正！！[此贴子已经被作者于 14:11:23编辑过]
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一、&V-ingV-ingV-ing+（PP1-99）（PP1-177）--& 因此 by imitating and practicing不好，要用 by imitate and practice.&&& result from….V-ing。&&&&&& &&&&&&&&Suffer from + A&&&AAV-ingCreatures of the seabed were suffering from&&&&&dwindling food supplies,&&&&&&&&&&&&&&&&&&& possibly resulting from increasing sea surface temperatures during the same period.&&&&&&&&&&&&&&&&&&&& &Creatures of the seabed were suffering&&&&because food supplies were dwindling, possibly as a result of an increase in sea surface temperatures during the same period.[此贴子已经被作者于 10:41:29编辑过]
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177.(24315-!-item-!-188;#058&000969) 動詞時態、修飾語錯誤修飾、語意邏輯連慣性、介係詞＋V-ing會在時態上與句意產生歧異，此時用介係詞＋名詞&&&&&&&&較佳。&In her 26 years in the forests of Gombe, Jane Goodall collected data that proved that chimpanzees exhibit the kind of curiosity so that new patterns of behavior and expression can be passed on from each one to others by imitating and practicing&A. exhibit（O）the kind of curiosity so that（so that….&&&&&&&&&&&& ()） new patterns of behavior and expression can be passed on from each（累贅） one to others by imitating and practicing（X，句意上沒有正在進行的意思，因此用V-ing的形式不好）B. will exhibit（基本上在陳述一項事實，用現在簡單式即可） the kind of curiosity so that（so that….&&&&&&&&&&&& ()） new patterns of behavior and expression can be passed on from one to another by imitating and practicing（X，句意上沒有正在進行的意思，因此用V-ing的形式不好）C. will exhibit&&&&&&&&（基本上在陳述一項事實，用現在簡單式即可）the kind of curiosity so that（so that….&&&&&&&&&&&& ()） new patterns of behavior and expression can be passed on from one to another by imitation and practice（O）D. exhibit（O） the kind of curiosity by which（O） new patterns of behavior and expression can be passed on from one to another by imitation and practice（O）E. exhibit（O） the kind of curiosity where（錯誤，where不能指代curiosity） new patterns of behavior and expression are passed on to others by imitation and practice（O）
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如果是被证明是某一自然规律或现象,无论前面是过去还是将来,这个规律的内容都用动词原形表示.
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以下是引用vincentliew在 17:05:00的发言：如果是被证明是某一自然规律或现象,无论前面是过去还是将来,这个规律的内容都用动词原形表示.同意，另外关于by doing和by noun.，我记得在哪里看到过，如果有by后面的这个词有名词形式，就用名词，实在迫不得已再用doing，这样的理解对么？不过，我也认为，应该从句子中的逻辑主语看by后面的词，如果存在逻辑主动关系，可以用doing。
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個人認為by doing和by noun本身沒有優劣之分...
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以下是引用天蝎座1107在 17:31:00的发言：In her 26 years in the forests of Gombe, Jane Goodall collected data that proved that chimpanzees exhibit the kind of curiosity so that new patterns of behavior and expression can be passed on from each one to others by imitating and practicing&&&& &&&A. exhibit the kind of curiosity so that new patterns of behavior and expression can be passed on from each one to others by imitating and practicing 前面都没有什么错误 关键错在by imitating and practicing 它的逻辑主语new patterns是不能主动发出这样的动作 在prep320中也有考到by后面跟doing还是名词 from each one to others不如from one to another好 B. will exhibit the kind of curiosity so that new patterns of behavior and expression can be passed on from one to another by imitating and practicing 比A更好 但是同样错在by imitating and practicing上 C. will exhibit the kind of curiosity so that new patterns of behavior and expression can be passed on from one to another by imitation and practice D. exhibit the kind of curiosity by which new patterns of behavior and expression can be passed on from one to another by imitation and practice 改变句意 new patterns can be passed on并不是by curiosity而是 前面整个exhibit the kind of curiosity这件事 而且原句强调so that是有个因果关系在里面 这里也削弱了这层意思 E. exhibit the kind of curiosity where new patterns of behavior and expression are passed on to others by imitation and practice关系词用的不对where& 少了情态动词can 当原句中有情态动词时 正确选项也是一定要有情态动词的 others在这里指代不清&&&&&&&&
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以下是引用AlienX在 23:07:00的发言：個人認為by doing和by noun本身沒有優劣之分...agree.
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以下是引用zbna5在 11:14:00的发言：答案是D
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D is better than C. 1. "by which" is used to emphasize "curiosity" which is respondent to "the kind of". If "so that" is better, the sentence will be "exhibit curiosity so that..."2. future tense should be "would" in C
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以下是引用AlienX在 23:07:00的发言：個人認為by doing和by noun本身沒有優劣之分...这个道理我今天才明白被动语态中同样可以用by doing的 prep320中有一题就是这样
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