Answer:
It's C and D (The last two)
Explanation:
Because "has" and "he" are directed to a person, in this case "has" goes to someone you are talking to and "he" to yourself.
And yet "hay" or "había" does not go to someone in particular.
Answer:
Cuando él _____se cae__________ de las rocas, yo siempre _____creo_________ que él ______está_______ muerto pero después de unos minutos, usualmente _____se levanta_______. (levantarse / caerse / creer / estar)
Yes the "Preterite tense" is to speakabout the past in some way