龙不再是传说挖出真龙:英语选择!

来源:百度文库 编辑:高校问答 时间:2024/04/27 22:14:50
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。

B

B