I opened the door half an hour ago.改为现在完成时急,改出十分感谢

分类: 作业答案 • 2022-04-14 09:49:05

问题描述：

I opened the door half an hour ago.改为现在完成时
急,改出十分感谢

答

I have opened the door since half an hour ago.
I have opened the door for half an hour .