A long time ago, in the 19th century, some people sometimes used an before some words that began with "h". I don't think such usage is possible in modern English. CB

When are you leaving the/your hotel? CB

You need keep if an objec t is involved: That'll keep me focused. Stay focused is fine if there is no object. CB

Cuto should be capitalized if it's the name of your cat. I think your explanation about who and which are applicable to relative pronouns in many contexts. In your dialog who is an interrogative pronoun, and which would be wrong. Who is fine.

No. I have no idea what you are trying to say. CB

The conjunction that can normally be omitted. Both are correct. CB

The exact dates for my visits have not been confirmed. CB

I don't think it's physically possible to settle down in more than one city. My suggestion: I live in London but I would like to move elsewhere where I would have better training and career opportunities. CB

index finger Hi Clive Is forefinger used at all in Canada? That's the word my English teacher taught me when I went to school. Maybe it's British? CB

The sentence looks fine to me with or without a comma. CB