Voilà, je bloque sur un excercice, j'ai trouvé des réponses mais je ne suis pas du tout sur de mon fait
Il faut choisir entre le prétérit et le plusque-parfait( be+ing ou simple).  
The first time Dunbar came to the village was back last summer. he had found a wounded woman by the river . She had a bad wound on the side of her head and since he (can , not ) revive her he (decide) it (be) better to take her back to the village . At that time he (feel) very lonely. He (hear , not ) from his commander fot months and he no longer (know) what he (do) there . Previously , when the commander (offer) him to keep the outpost at the frontier he (see) it as an opportunity to be alone with his own thoughts . However , soon the solitude of his life ( become ) inhuman and only the daily visit of the colf ( take) him away from madness. But, now that he (come) toknow the Indians he (know) that he (belong) there , in the Prairie.  
 
1could'nt
 
2decided
3was
4was feeling
5had not been hearing
6knew
 
7was doing
8had offered
9had seen
10had become
11had taken
12 came
13 knew
14 belonged
 
merci d'avance

really nobody to help me???????

All of it is correct  

not quite correct :
 
1 couldn't
4 felt  
5 had not heard