Change the voice: I had hoped that they would fix my locker while I was away, but they didn’t.

I had hoped that my locker would be fixed while I was away, but it wasn’t

I hoped that my locker would be fixed while I was away but it wasn’t

None of these

Identify the Object and Subject:

Active Voice: "I had hoped that they would fix my locker while I was away, but they didn’t."
Object: my locker
Subject: they

Convert to Passive Voice:

The object ("my locker") becomes the subject of the sentence.
The verb phrase "would fix" changes to "would be fixed" to reflect the passive construction.
The original subject ("they") is omitted as it is unspecified in the passive voice.