一道让我昏倒的语法题 求助

没人要的丫头

GWD-13-28

Q28:

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.

1. sloth found in Puerto Rico in 1991, and dated at 34 million years old, made it the earliest known mammal of
               
2. 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
               
3. sloth that was found in Puerto Rico in 1991, was dated at 34 million years old, making this the earliest known mammal of
               
4. sloth, found in Puerto Rico in 1991, have been dated at 34 million years old, making the sloth the earliest known mammal on
               
5. sloth which, found in Puerto Rico in 1991, was dated at 34 million years old, made the sloth the earliest known mammal of

我通过排除 选出D 

但是对found in Puerto Rico in 1991这个部分不能理解

语法上ed分词作定语就近修饰SLOTH 但是逻辑上又修饰Fossils

求 NN指点

cuishang11

不是NN

不过推荐mm 去看下个个帖子

http://forum.chasedream.com/dispbbs.asp?boardid=23&replyid=35691&id=5708&page=1&skin=0&Star=1

其中lyricling的发言比较有启发性