Fossils of A(plant) that have B(been extinct) for C(fifty million years) have be

游客2025-04-17 2

问题 Fossils of A(plant) that have B(been extinct) for C(fifty million years) have been found in large deposits of amber D(near) the Baltic Sea.

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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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