炫龙炎魔t50:英语选择！

来源：百度文库编辑：神马品牌网时间：2024/10/03 06:30:14

Has Peter finished his composition yet?
I have no idea of it,he _____ it this morning.
A.did B.was doing C.has done D.had done

请说明理由

B
理由是说话者不知他是否做完，只能说看到他今天早上正在做。

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