Choose the correct preposition to complete the sentences

1. As I look [to|back|forward] on my school years, I regret nothing.
2. I've been looking [at|in|for] the solution for years. Do you think you can do it in a week?
3. Look [away|out|through]! There's a cyclist behind you.
4. She's so arrogant! I hate the way she looks [up|down|forward] on people.
5. I'm looking [forward|up|after] to the camp trip next week. It's going to be wild!
6. I didn't have time to read the report carefully. I just looked it [up|through|within].
7. Can you look [after|in|through] my cat while I'm away?