Hola!! Your answer for this question is oficina de correos.
1.) If you translate the question you get:
I need to buy an envelope in a ____
post Office
Bank
Bakery
Museum
2.) From the options, the best answer will be the Post Office. You can buy an envelope there.
Answer: Parallax is a method of measuring distance to an object.
Explanation:
El/la is stem Changing verbs
Answer:
1. yo comí fruta ayer
2. yo escribí un mensaje anoche
3. yo corrí el mes pasado
4. yo ví una película el viernes pasado
5. yo bebí un refresco la semana pasada
6. yo salí con mis amigos el fin de semana pasado
I hope you do well, that's what I understood :)