Answer:
1. Sergio esta nervioso porque no estudio para el examen
2. Cristina no esta nerviosa porque estudio mucho y tomo buenas notas.
3. Cristina se siente segura de que va a obtener buenas notas en el examen.
4. El cuaderno de cristina esta en el compartimento chico de su maletin.
Explanation:
1. Sergio is nervous because he did not study for the exam.
2. Cristina is not nervours because she studied a lot and took good notes.
3. Cristina feels confident that she will get good grades on the exam.
4. Cristinas notebook is in the small compartment of her briefcase.
