Fill in the blanks with appropriate prepositions.

Here are the completed sentences with the correct prepositions:

1. The sun's rays came through the small windows.
2. The man was leaning against his friend.
3. The Scouts took almost an hour to get up the hill.
4. I have not seen any doctor since I got here.
5. Becky slotted her letter into the letter box at the post office.
6. We walked along the street through the valley.
7. The police started looking for him, he had gone underground.
8. The scenery from the top of the mountain looked superb.
9. I took with me all the documents.
10. Some people are still haunted by their past mistakes.