Answer and Explanation:
In Spanish, the words <em>por</em> and <em>para</em> are commonly confused because of their similar meaning. Por and Para are usually used instead of 'for'. However, they are used in different situations.
There are different ways in which we can accurately use the preposition 'por' instead.
<em />
<em>For</em><em> example (</em><em>por</em><em> ejemplo):</em>
To mention the reason behind a behavior
<em>Because of - Por</em>
- I didn't go to the movies <u>because of</u> the rain.
- No fui al cine (yo) <u>por</u> la lluvia.
To say Thank you
<em>Thanks for… - Gracias por...</em>
- Thanks <u>for</u> your help.
- Gracias <u>por</u> tu ayuda.
To indicate proximity (place)
<em>Around here / near here - Por aqui</em>
- The restaurant is <u>near</u> here.
- El restaurante está <u>por</u> aquí.
To indicate that someone is performing or has performed an action
<em>Done by - Hecho por</em>
<em />
- The book was written <u>by</u> Stephen King.
- El libro fue escrito <u>por</u> Stephen King.
La llave is number 1 and number 2 is habitación doble
11. ser
12. Estar
13. Ser
14. Estar
15. Ser
16. Estar
17. Estar
18. Ser
19. Estar
20. Ser
May I ask what is the sentence? I could help you