Question

ティティ

なぜ、ここは2番ではなく3番なのですか？

回答よろしくお願いします。

) when I came back."
"Be careful. The window (
"Oh, I'm sorry. I won't forget to lock the window next time."
1. had been open left 2. had been left opening
3. had been left open
4. had been opening left