You add -es to the plural form a Spanish noun that ends in a consonant.
1. abuelos
2. hermana
3. tío
4. primo
5. pintor
6. médica or doctora or enfermera (nurse). could be either
7. escritor
8. programador
Hope this helped :)
The correct way to say "at 8 o'clock" is c) a las ocho.
