Which tense do use for time in the past?

a.
imperfect

b.
preterite

b. imperfect

Explanation:

For your specific question, we always use imperfect when telling time in the past. Eran las dos de la mañana. This is something you just have to memorize.

read the text, then mark the beginning, the node and the outcome, and point out the characteristics of the quantum manifested in the story

the black sheep

in a distant country a black sheep existed many years ago, was shot.

a century later, the repentant flock raised an equestrian statue that was very good in the park.

thus, in the future, every time that black sheep appeared they were quickly passed by the arms so that the future generations of common sheep could also be exercised in the sculpture