B. mis, mi. The first one is plural and second is singular.
1)"Yo necesito comprar nuevos zapatos."
2) "Yo necesito zapatos medianos."
3) "Tambien yo necesito comprar calsetines tamano mediano." (in the word 'tamano' the n suppose to have the curvy line above but I don't have it in my keyboard)
Hope this helps :D
Pollo frito y salsa agridulce
it would be estamos
nosotros estamos en la casa
i believe thats the answer