T-4-Q1 TS-7-41求解

sunyuwei

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. at which it is known that humans had made

C. at which humans are known to have made

D. that humans are known to be making

E. of humans who were known to make

A. 关系代词用when和at which都是可以的,这里更偏向后者，因为when是要跟具体的时间；A的意思是把知道这个事实的日期往前推了，而C的意思是这个事实被往前推了，但know还是发生在现在的；

关于这道题的用at which 还是when 的逻辑问题不太明白，解释中说的“A的意思是把知道这个事实的日期往前推了，而C的意思是这个事实被往前推了”是什么意思？搜了一些帖子没有很理解，麻烦NN解答

elleven806

同问！！！
再多追加一个问题
sb is/are known to do 和sb is/are known to have done..请教有啥子不同啊？

sunyuwei

elleven806 发表于 2014-10-19 11:39
同问！！！
再多追加一个问题
sb is/are known to do 和sb is/are known to have done..请教有啥子不同啊？ ...

貌似说的是made 这个动作发生在know之前

elleven806

sunyuwei 发表于 2014-10-19 12:49
貌似说的是made 这个动作发生在know之前

再再追加一个问题
it is known that humans made
这个it 是形式主语么？其实是 that humans made stone tools is known?
还是神马的？这个 it是干什么的呀？

sunyuwei

elleven806 发表于 2014-10-19 16:04
再再追加一个问题
it is known that humans made
这个it 是形式主语么？其实是 that humans made stone  ...

我认为你说的是对的，it是形式主语，其实是 that humans made stone tools is known

sunyuwei

ddddddddddd

sunyuwei

ddddddddddddd

lisafhasai

我觉得A选项中when后面是一个强调句：it is known ... 而 it 应该强调的是 date 所以翻译一下就是：那天 知道人类开始制造了工具的那天---所以这句话表达的是把知道这个事实的时间推前了
而C则强调的是human，人类被认为已经开始制造工具的那天，强调人类制造工具的时间，所以可以翻译为：把人类被认为开始制造工具的日期提前了。
不知道表达的是否清楚，但是我觉得应该是这样，欢迎讨论，求赐教

sunyuwei

lisafhasai 发表于 2014-10-26 10:52
我觉得A选项中when后面是一个强调句：it is known ... 而 it 应该强调的是 date 所以翻译一下就是：那天 知 ...

我这两天在总结一些东西，其实我觉得像这种这么微妙的区别没必要深究了，真正考的时候也不会看的这么细，还是看关键的点比较重要一点，再比较选项。你觉得呢？

songziwei

  并不是强调句 ，如果是强调句那去掉it is 。。。that剩余部分意思正好完整