Answer:
Possible answers
Q1 justo Q2 sus Q3 hacer Q4 levantaba Q5 sufrieron de...
Step-by-step explanation:
Q1 Cuando justo habías tratado de estar...
Just is necessary because it relates the second part of the sentence with the first
Q2 ... Paola ya había hecho sus ejercicios de...
Her The possesive adjective links the noun exercises with Paola
Q3 Carolina ya se había entrenado en hacer ejercicios...
To do is used in Spanish with exercises, as you can see in Q2
Q4 Yo ya levantaba pesas antes...
Weight lifting = levantar pesas
Q5 Ya los empleados sufrieron de el (del) estrés...
This is a tricky one; because of the adverb od time Ya I suppose that they already suffered from stress. But maybe I´m wrong.