You will be given a definition of a task first, then some input of the task.
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.

but i'd rather believe that it was out of the kindness of his heart wouldn't you when we got on the train i felt as if everybody must be looking at me and pitying me but ____ just went to work and imagined that i had on the most beautiful pale blue silk dress because when you are imagining you might as well imagine something worth while
Output:
i