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.
Input: matthew barely noting that it was a girl sidled past her as quickly as ____ without looking at her had he looked he could hardly have failed to notice the tense rigidity and expectation of her attitude and expression she was sitting there waiting for something or somebody
Output:
possible