C cause it’s basically saying “I know them”
Estoy nervioso!
¿Estan contentos
Tim, Mack ¿estan preparados?
Tim y Mack estan muy nerviosos.
Answer:
1, 2, 3, 4, 6 and 8 are incorrect although I'm not sure if you're asking if they.re right or for help putting them together.
Explanation:
Just in case:
1: I left: Sali
2: I am leaving: Salgo
3: He eats a lot: Come mucho
4: He ate a lot: Comio mucho
5: They will arrive: Llegaran
6: They arrived: Llegaron
7: You will work: Trabajaras
8: You work: Trabajas
Hope this helps :)