GIVE ANSWERS - Deutsch

Қазір дауыс бер!Жауапсыз

Hallo,I'm learning german now and I have some question.Can you help me?

1.How to write"I meet you" in Deutsch? (please use this word: "sich treffen")

2.What difference with "unterschiedlich" and "verschieden"?

3.What dirrerence with "bitte","Verzeihung" and "tut mir Leid"?(They all means sorry,so I can't distinguish.)

Vielen Dank.