- Nombre que se usa para identificar a una persona que viaja a diferentes lugares por placer y aprender: pasajero
- Antes de entrar a un tren o un vuelo debes enseñar la tarjeta de embarque o boleto.
- Ayer nosotros teníamos/tuvimos
In this case, we must have a high degree of knowledge of the vocabulary of the subject.
It should be noted that in the last exercise you are asked to use the imperfect past tense and the simple past tense since the only information we have from the sentence is time, which is past by the word "ayer" (yesterday).
That the simple past tense to narrate what they have done and the imperfect past tense is to describe how they were or what they did or how they felt, but since we don't have context we can't say which would fit better.