天山-7-41

菊花刀

牛牛们，别笑话我，我到现在还不知道为什么不选E。请详细解释一下。脑子秀逗了。我看这题想的时间最长，然后把后面的pace也弄乱了，结果这一套模得极差

hiphoper

回51樓

[此贴子已经被作者于2007-8-20 21:48:48编辑过]

hiphoper

"date of human" 語意不通

mimixiaxia

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.

1. when it is known that humans made

2. at which it is known that humans had made

3. at which humans are known to have made

4. that humans are known to be making

5. of humans who were known to make

这题我也不明白啊,XDF给的答案是E, E的of用的是不太好,不明白这是什么结构,不过C其实问题也很多啊,前面的NN们讨论出用完成时是对的(总觉得有点牵强......),但那个 are又怎么解释呢
答案是比出来的,那我觉得E应该比C好
呼唤大家再讨论讨论

myronx

以下是引用mimixiaxia在2007-8-25 20:32:00的发言：

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.

1. when it is known that humans made

2. at which it is known that humans had made

3. at which humans are known to have made

4. that humans are known to be making

5. of humans who were known to make

这题我也不明白啊,XDF给的答案是E, E的of用的是不太好,不明白这是什么结构,不过C其实问题也很多啊,前面的NN们讨论出用完成时是对的(总觉得有点牵强......),但那个 are又怎么解释呢
答案是比出来的,那我觉得E应该比C好
呼唤大家再讨论讨论

我就是根据were排除E的

首先问个问题，你觉得humans被谁known？应该是被scientists吧？那既然scientists都have dated了，这里是不是应该are known呢？

myronx

找到原句了http://www.answerbag.com/q_view/279672

不过不太一样

..., pushing back by more than 150,000 years the known date at which humans were making stone tools.

nemojia

原句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,用的是现在完成时,根据一个句子不能同时有过去时和现在时  排除abe  

还有大断的时间  和 从现在起往前推的时间都用现在完成时

来源于XDF

rac111

白勇语法书里面的说定语从句可以由关系副词when/where/why来引导的！如果白勇不错，则A的引导是没有问题，关键是it is known that sb/sth do和sb/sth be known to do 的结构选择问题，原来选A，现在支持C

hollygrail

模考的时候选C,REVIEW的时候觉得E才是正确答案:

1.A,B,C,D都是定语从句修饰date,when和at which都可以引导,at which清晰一点.D的that肯定不对.

2.ABC都有歧义,不管是when还是at which,(A,B)放在定语从句中都做一个时间状语的作用,代替earliest date,在A,B中,这个时间状语就近修饰it is known....即知道(原始人制造石器)的时间.这个时间状语实际上应该修饰humans made stone tools,而不是it is known.即the earliest (known) date when humans made stone tools

C一样有歧义,at which修饰humas are known,而不是不定式to have made

E虽然第一眼看上去不爽,但是却找不出毛病来,the earliest date of humans (who were know to make ...),(已知的制造石器的)人 的最早的时间.

这个date of 还不能省,虽然earliest humans更精炼,因为前面的pushing back by more than 150,000 years.

至于E答案的were known,看起来有点怪,但实际上符合逻辑,从earliest date以后,讲的都是过去对原始人造石器的认识,正是新的发现把旧的认识时间给提早了150,000年.

其实原句是最清晰的,出题者出题时把修饰关系给严重扭曲了:

More than 2,600 sharp-edged flakes, flake fragments, and cores (cobbles from which flakes have been removed), found in the fine-grained sediments of a dry riverbed in the Afar region of Ethiopia, have been dated to between 2.52 and 2.60 million years ago, pushing back by more than 150,000 years the known date at which humans were making stone tools.

原句: known date 清晰没话说,地道英语

        at which humas were.....    at which做时间状语修饰humans were making,清晰

[此贴子已经被作者于2007-11-24 2:15:43编辑过]

dormousedzc

date that humans are known to be making

date 后面可以跟that???