Answer: The first sentence is correct.
Los estudiantes escuchan Al profesor Jimenez.
Without the video or more information it's very difficult to help you out.
Answer:
1.Nada
2.Nadie
3.Nunca
4.Tampoco
5.Ningún
Explanation:
1. seriamente
2. frecuentemente
3. rápidamente
4. lentamente
