Spanish: Yo limpio
English:I clean
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.
La señora bonita
I am not sure that is what you needed but I changed the noun bonito into a female adjective which would be bonita. If this is not what you need please comment so I can further help you!