The environmental balance among ecological communities is exceedingly complex.

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问题 The environmental balance among ecological communities is exceedingly complex.

选项 A、almost
B、successfully
C、extremely
D、rarely

答案C

解析 almost几乎，差不多；successfully顺利地，成功地；extremely极端地，非常地；rarely很少地，罕见地；exceedingly非常地，极度地。

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