蝌蚪有毒吗:英语选择!

来源:百度文库 编辑:中科新闻网 时间:2024/05/15 10:05:19
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