1. ---Why did you go back upstairs?
I thought I____________________________(忘了关窗户). (leave)
2. Yesterday my cousin _______________________(遭遇到扒手掏腰包了) on his way to school. (pick)
3. Mike __________________(肯定不在打扫)the classroom now. I saw him playing basketball on the playground a moment ago. (clean)
