The original sentences are wrong because this exercise helps you to reach how to conjugate verbs in a perfect way.
tú: informal
usted: formal
vosotros: familiar- only in Spain , to males or mixed group.
vosotras: familiar- only in Spain , to a group of females.
ustedes: plural, formal or informal.
Celebration : corbata esmoquin Bermuda zapatillas camisa
Playa: bikini camiseta
Casa: pijama camisón
And for americana im not sure but I hope this helps
