【題目】Copernicus suggested that the earth was (spin) as it went round the sun.

【答案】spinning
【解析】句意：哥白尼指明，地球圍著太陽轉(zhuǎn)的同時，正在旋轉(zhuǎn)�？芍眠M行時態(tài)，所以答案是spinning。

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