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.

and since sitting and waiting was the only thing to do just then she sat and waited with all her might and main matthew encountered the stationmaster locking up the ticket office preparatory to going home for supper and asked ____ if the five thirty train would soon be along
Output:
him