Answers:
1. Subject pronoun is “la luz”
2. Cerramos, Subject pronoun is “la puerta”
3. Almorzarán, Subject pronoun is “la clase de ingles”
4. Enseñan, Subject is “Los profesores”, Subject pronoun is “ejercícios”
5. Escucharé, Subject pronoun is “música clásica”
6. Estudiamos, Subject pronoun is “la clase de ciencias sociales”
7. Bailas, Subject is “Tu”, Subject pronoun is “la clase de música”
8. Monta, Subject is “Anita”, Subject pronoun is “monopatín”