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GWD-13-Q28:
GWD-13-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.
sloth found in Puerto Rico in 1991, and dated at 34 million years old, made it the earliest known mammal of
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
sloth that was found in Puerto Rico in 1991, was dated at 34 million years old, making this the earliest known mammal of
sloth, found in Puerto Rico in 1991, have been dated at 34 million years old, making the sloth the earliest known mammal on
sloth which, found in Puerto Rico in 1991, was dated at 34 million years old, made the sloth the earliest known mammal of
Ｅ为什么不对？Ｄ为什么用完成时？
E的话found in puerto rico in1991变成修饰sloth而不是fossils了,把原句的意思改掉了。原文的意思是1991年在波多黎各发现的化石，而e变成了1991年在波多黎各发现的sloth
E的错误比较明显:was dated ..., made ....直接俩谓语了
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