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
答案是D，E选项错的原因是什么呢？类似found in Puerto Rico
in 1991这样的结构到底修饰的什么？ | 
京公网安备11010202008513号 京ICP证101109号 京ICP备12012021号
发表于 2011-3-3 22:57:28
收藏
收藏
楼主
