牛牛们来看一下这几道gwd~~~~

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.

      A.      a single ancestor’s who is thought to have lived

      A.      a single ancestor’s who is thought to have lived

B.       a single ancestor’s who was thought to live

C.      a single ancestor whom it is thought had lived

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

E.       the Y chromosome of a single ancestor whom it was thought had lived

这道题为什么选d,b哪里错了呢？？？

In no other historical sighting did Halley’s comet cause such a worldwide sensation as did its return in 1910-1911.

A.      did its return in 1910-1911

B.       had its 1910-1911 return

C.      in its return of 1910-1911

D.      its return of 1910-1911 did

E.       its return in 1910-1911

这道题答案是a，但我觉得应该是d

GWD-18-Q18

The first shots of the American Revolution, fired at Lexington and Concord, Massachusetts, were, according to legend, heard around the world, but news of these shots, which were sent by swift messenger, took four days in reaching New York City as well as another additional eleven days to reach Charleston, South Carolina.

A.      shots, which were sent by swift messenger, took four days in reaching New York City as well as another additional eleven days

B.       shots that was sent by swift messenger took four days in order to reach New York City, and also another eleven days

C.      shots that were sent by swift messenger took four days to reach New York City and another eleven days

D.      shots took four days by swift messenger in order to reach New York City and another eleven days in addition

E.       shots took four days by swift messenger to reach New York City and another eleven days

这题是选E，可是C哪里错了？

各位大牛来看看吧

1. 代词只能指代中心词而不能指代修饰词，由于是ancestor’s，其中ancestor’s是修饰语，所以在B中用who指代ancestor就错了

2. A把did放在前面是与前面的结构sighting did Halley’s comet对称，而且in是接一段时间表示在1910-1911之间，而D中用of不够精准。

3. n+that+adj.一般是错误的结构，因为这个结构不够简洁adj+n总是优于这个结构，所以C错

GOOD EXPLANATION.

1ancestor’s 后面没见过跟WHO的

2我选了C.请帮我解释一下.我对这句的结构不甚熟悉.

3 C不够简洁

C也是用的of不够准确，而且没有补助动词，比起A来就不好了

In no other historical sighting did Halley’s comet cause such a worldwide sensation as did its return in 1910-1911.

这句话的意思是，没有什么 historical sighting 能比得上Halley’s comet‘s return in 1910-1911 to cause such a worldwide sensation

是一个否定词前置的倒装结构