Great job Aojewel.

You’ve managed these scenarios very well.

Here’s some feedback:
no.1 – to sound more natural, you can say: ….what does “back on track” mean? (instead of: what does it mean “back on track”.)

no.6 – He is not polite at all towards Jemma – this is not incorrect but it sounds more natural to say > He is extremely rude to/towards Jemma
(or he is in a bad manner towards Jemma) – better to use this as an adjective: bad-mannered (Here are some synonyms> ill-mannered, rude, unmannered, unmannerly. impolite – not polite.)

If I were her I would quit him – this is very nice! 🙂
You can also say If I were her I would dump him (British English)