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-reirse, 2- i think its canaries, 3-she accompanies the groom to the wedding and 4- los fuegos artificiales
Answer:
A.
nada, nadie, ningun, tampoco, algo, nada
B.
alguien, nadie, algun, algunas, algun, ningun, nunca, nada, ninguna, tampoco