hi, can you help me to make story/ article with 20 an idiom please...

Kindly Translate them correctly please..
EXPRESIONS COMMONLY MISTRANSLATED
1. I’m going down..
2. I’ll be the one to do it..
3. Where are you studying?
4. I’ll ask her an apology.
5. Anybody who’s sitted here?
6. The next number of the program will be a song
7. We will make an ocular inspection.
8. Please pass by for a few minutes.
9. They usually stand by here.
10. I just commuted.