Both say “it’s their store” it just depends whether you are talking about one or more people. Su is usually he/she but it can mean they/it if you are being non-gender specific. Personally I would go for Es sus tienda but I’m not a native Spanish speaker so I could be wrong
5. lechuga
6. primos
7. oler
8. la gripe
9. ir al cine
10. fregadero
11. pongo
12. dormimos
13. estan trabajando
14. soy
15. es
16. I think it's azul y nueva
17. le?
18. te gusta
19. les gustan
20. Ellos la compran para mi
21. Me lavo los dientes y me ban~o
22. fue
23. comistes
24. ibamos
25. Yo caminaba cada dia.
I hops this helped!
When you paint your nails?
what is the rest?