Fascinated,Nina stared at the stranger.Who was standing in the doorway. She wondered if she could convince him they had met before.

Where is the fragment and how do I fix it?

This is the fragment:

Who was standing in the doorway.

How will you fix it?

Based on the provided text, there doesn't seem to be a mention of a fragment or anything that needs to be fixed. Could you please provide more context or clarify your question?

It seems like the sentence you provided is a fragment because it does not form a complete thought or sentence. Fragments can be fixed by either adding a subject or verb, or by attaching them to a nearby complete sentence.

To fix the fragment, you can do one of the following:

1. Add a subject: "Nina, fascinated, stared at the stranger who was standing in the doorway."
2. Add a verb: "Fascinated, Nina stared at the stranger standing in the doorway."
3. Attach it to a nearby complete sentence: "Nina stared at the stranger who was standing in the doorway, fascinated."

By making one of these adjustments, you can fix the fragment and create a grammatically correct sentence.