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.
1. Me enfermaba con frecuencia, cuando 2. íbamos a la playa.
<em>I got sick frequently when we went to the beach.</em>
3. Tuvo por lo menos tres accidentes, 6. cuando éramos pequeños.
<em>He had at least three accidents when we were children.</em>
5. A menudo, los fines de semana, 4. me duele la garganta.
<em>I often have a sore throat on weekends.</em>
21 is cena 12 is bebidas 14 zanahoria