GWD17-Q38 没人问，求助 9.4

allen0018

    

GWD17-Q38:

    

All Y chromosomes in existence today are
descended from a single ancestor’s who is thought to have lived about
140,000 years ago.

    

 

    

1. a single ancestor’s who is thought to have lived
2. a single ancestor’s who was thought to live
3. a single ancestor whom it is thought had lived
4. the Y chromosome of a single ancestor who is thought to have
        lived
5. the Y chromosome of a single ancestor whom it was thought had
        lived

答案D 我错的比较冤 我选的是A   我想问下，细胞染色体最开始是一个还是一群？？
我就是为了选一群选的  A 
怎么从文章里面体现的呢？？？

allen0018

接着问

gonghao

A错，who不能修饰所有铬

waiu_0235

我是用be 動詞的平衡來解題

(A)  All Y chromosomes  不等於 a single ancestor’s

(B) (C) 同上

只剩下D E

(E) whom it was thought had lived  

不如(D) consice,  至於whom...我只是覺得很奇怪而已,不過我不會解釋

for example:  He is thought that he is a great teacher 

 -------------> He is thought to have been a great teacher

eddienumb

who怎么能修饰ancestor 的染色体呢？

应该修饰ancestor才对阿  ：）

rockmax

    D.  the Y chromosome of a single ancestor who is thought to have lived  

问一下D 中who  能改成whom 吗?

[此贴子已经被作者于2008-10-12 17:44:41编辑过]

huyannancy

以下是引用rockmax在2008-10-12 17:44:00的发言：

    D.  the Y chromosome of a single ancestor who is thought to have lived  

问一下D 中who  能改成whom 吗?

肯定不能改成whom, whom应该在从句中做宾语，但是定语从句中缺少的成分是主语，必须用who

tiffany1102

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meowlac

请问   have lived 怎么后面的时间状语是 140,000years ago?

irislei

我也想问问这道题时态的问题140,000years ago为什么用完成时?