who (sing) this song in the music room this morning?用所给词适当形式填空.

问题描述:

who (sing) this song in the music room this morning?用所给词适当形式填空.

答案:Who【sang】this song in the music room this morning?
翻译;今天早上谁在音乐室唱这首歌了?
解析;因为是唱后才问的所以要用一般过去时态.
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