Fossils of Aplant that have Bbeen extinct for Cfifty million years have been found in large deposits of amber Dnear the Baltic S

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问题 Fossils of Aplant that have Bbeen extinct for Cfifty million years have been found in large deposits of amber Dnear the Baltic Sea.

选项 A、 
B、 
C、 
D、 

答案A

解析 与后面的have been extinct相搭配,此处的plant应是复数。
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