[jiang]

Dear teachers,

I have three questions to ask.

No.1
Please read the following sentences:
1. It wasn't cold or wet.
2. For 10 days he did not see Tenis nor telephone her.
I think the structures of the above two sentences are the same, so I can use "nor" in sentence one or "or " in sentence two?
3. It was neither cold nor wet. (can I use "or")

No.2
Something my sister was drawing attracted my attention. I had never seen her draw anything like it before.
I can't use something because it is a negative sentence. Is that right?

No.3
Another person's good opinion of you is something to live up to, not to lean on.
I can't use everything because "everything" suggests plaural form while "opinion" suggests singular form. Is that right?

Looking forward to hearing from you.
Thank you in advance.

Jiang