Three hundred years ago people were (debate) ______ whether the earth or the sun

游客2024-07-02 14

问题 Three hundred years ago people were (debate) ______ whether the earth or the sun was the center of the universe.

选项

答案 debating

解析本题表示过去某个时间某事正在进行，所以应该用过去进行时。

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