ＧＷＤ８－３４，请ＮＮ指点一下哦

yoyo9012

Fossils of the arm of a sloth found in Puerto Rico in 1991, and dated at 34 million years old, made it the earliest known mammal of the Greater Antilles islands.

 

A.   sloth found in Puerto Rico in 1991, and dated at 34 million years old, made it the earliest known mammal of

 

B.   sloth, that they found in Puerto Rico in 1991, has been dated at 34 million years old, thus making it the earliest mammal known on

 

C.   sloth that was found in Puerto Rico in 1991, was dated at 34 million years old, making this the earliest known mammal of

 

D.   sloth, found in Puerto Rico in 1991, have been dated at 34 million years old, making the sloth the earliest known mammal on

 

E.    sloth which, found in Puerto Rico in 1991, was dated at 34 million years old, made the sloth the earliest known mammal of

 

 我选Ｄ了，但是答案怎么有Ｄ版还有Ｃ版，还各自讲的很有道理，到底是哪个呢？请ＮＮ指点一下．．．

yoyo9012

谢谢指点!

tangdream

选D

首先，found in Puerto Rico in 1991是修饰fossils，所以应该在sloth后用逗号隔开，做修饰状语

其实这一点就可以排除其它所有的答案了

C的问题：sloth that was found 错，说了，这个应该是修饰fossils而不是sloth的。第二，was

dated错，谓语应该用复数 。第三，this错，this不能单独指代前面提过的事物。第四，the earliest

mammal of the Greater .... of错，mammal 和islands之间不会有of的关系，只能是on the islands

总之，C是大错特错。。。

ferferzor

C 中THIS应该指代SLOTH. 不知道是否正确?

D 中HAVE BEEN DATED 感觉时态错.