Which one of these is formal? adi�s, señor. hasta luego, paco. chao

Formal: adiós, señor.

Explanation:

Formal language is that which is used in formal events or situations that require seriousness. Usually, speakers who use formal language in a conversation do not know each other very well, respect their hierarchy or find themselves in a framework of extreme cordiality. Some of the situations in which the use of formal language can be seen are the conversations between a doctor and his patient, between two leaders from different countries, between two strangers, between a teacher and his student, etc.

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1. a ella salir contigo.

a. le conviene

2. ¿cuánto los deportes a emilio?

d. le interesan

3. a antonella mucho las novelas.

c. le aburren

4. a ti un mes para terminar la carrera.

a. te falta

5. ¿sabes quién a tu mamá?

a. le cae bien