TASK DEFINITION: You are given an English sentence with a blank, and you need to predict the missing word. After completing, the whole sentence should be gramatically correct and non-ambiguous.
PROBLEM: had retired in haste to his club where he was chatting with some friends upon the events which served ____ a subject of conversation for three fourths of that city known as the capital of the world at the precise time when madame danglars dressed in black and concealed in a long veil

SOLUTION: as

PROBLEM: matthew had taken the scrawny little hand awkwardly in his then and there he decided what to do he could not tell this child with the glowing eyes that there had been a mistake he would take her home and let marilla do that she couldn't be left at ____ river anyhow

SOLUTION: bright

PROBLEM: so matthew went to bright river to meet him missus spencer will drop ____ off there of course she goes on to white sands station herself missus rachel prided herself on always speaking her mind she proceeded to speak it now having adjusted her mental attitude to this amazing piece of news

SOLUTION:
him