#8. pescado/verduras
#9. postre
for #8 put both answers so you can get half credit. Or the best advice would be to see what someone else got, or to ask the teacher.
Unas Sudadereras. Trajes de baño are Bathing suits :| unas chanclas are some sandals. Unos pantalones cortos are some shorts. So it’s B.) Sudaderas
You would use usted because it is the formal singular you.
Vivian estudió para el examen anoche