GWD-13-28

inthesky8

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

这题在讨论贴里大多数人都选D，对于D，found in Puerto Rico in1991,如果做定语的是不是省略了which be，可是这样的话，它不是应该修饰sloth了麽（因为which 是直接修饰它前面的名词的啊）？

Ironpanda

which应该是不能够省略的吧...C没有使用which和that从而更好的避免了修饰sloth的可能，这直接对应修饰前面的fossil