The Singular form is la mochilla.
Answer: Mis amigos y yo fuimos al cine y luego fuimos al parque. También tuve que andar en bicicleta porque no tengo auto.
Explanation:
Alli esta is grammatically correct. It is correct because alli esta means "there is" and in your example, There is the first floor, sounds better. The first floor is there doesn't sound correct to me. Hope this helps.
Answer:
please translate in English. I can't understand Spanish.
