I really don't know when I will start my trip=I really don't know_ _ _my trip.

来源：学生作业帮助网 编辑：作业帮 时间：2024/04/29 14:18:42
I really don't know when I will start my trip=I really don't know_ _ _my trip.

I really don't know when I will start my trip=I really don't know_ _ _my trip.
I really don't know when I will start my trip=I really don't know_ _ _my trip.

I really don't know when I will start my trip=I really don't know_ _ _my trip.
I really don't know（when）（to）（start）my trip.