Answer:
1. Sí, es necesario que traigamos el pasaporte al aeropuerto.
2. Sí, es urgente que hable con don Mario.
3. Sí, es bueno que David visite a su abuela todas las semanas.
4. Sí, es importante que Mariana llame a Isabel para darle las gracias.
5. Sí, es mejor que Andrés sepa lo que le van a preguntar en el examen.
Explanation:
You have to answer "Sí", and complete de sentence with the information given in the question.
That information, you have to put it with a subordinate substantive sentence.
Subordinate substantive sentences with subject function function as subject of the verb of the main sentence. These can be of two types, as regards the use of the subjunctive: opinion and reaction.
The opinions expressed in these sentences can be of two types: subjective opinion, according to this opinion may or may not be shared by the majority of other speakers, and objective opinion, opinion that - at least in a certain way - can be shared by the majority of the other speakers.
