This is EXCELLENT. Your level sees so high that you might want some nitpicking? :)

Some exercises: as soon as, if, when, until, unless

1. I'm going to buy a flat as soon as I have a secure job.

2. I'll continue learning English until I become fluent.

3. I'll be able to relax when I don't worry so much.

4. I'll be at home by seven o'clock tonight if I don't have any problem.

I suggest:

I'll be at home by seven o'clock tonight if I don't have any problems. (plural) or

I'll be at home by seven o'clock tonight if I don't have a problem.

The first one is what I think you intended.

 
5. I'm not going to go out tonight unless we have a good plan.

6. I'm going to travel to Seville next weekend unless it rains.

7. My English won't improve unless I speak more often with native speakers.

8. When she finishes her degree, she'll be able to work at a hospital.

You don't actually need the comma here but it's ok.
 
9. If she gets a job at the hospital, she'll have a great responsability.
Also don't need the comma and you spell it "responsibility".

10. When she gets older, she'll probably become a more responsible person.

Again no need for comma. I think Spanish speakers tend to use more commas.
 
11. She won't get a promotion unless she works hard.