Given the task definition and input, reply with output. 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.

it does really seem as if i must be dreaming well i'm sorry for that poor young one and no mistake matthew ____ marilla don't know anything about children and they'll expect him to be wiser and steadier that his own grandfather
and