Interested in Language
I am so confused for the following usage of pron, Help~~~~~~~~~~~~~~~, plz
1. I read about it in some book or other, does it matter which it was?
Why can't I substitute "where" for "which"?
2. "Who told you?" "Oh, somebody or other, I've forgotten who."
Why can't I substitute "which" for "who"?
3.Some of the students were late for the meeting, but I can't remember which.
Can I substitute "who" for "which"?