Chela is the same thing as cerveza. Both Mexican (Spanish) words mean "beer". Other words are pisto, bironga, helada and fría.
1. habia (present tense)
2. se llemaban (they were named/ their names were)
3. era (was)
4. tenia (had)
5. era
6. tenia (had)
7. conocio (met)
8. se llamaba
9. tenia (had)
10. se llamaba (she was named/ her name was)
11. era
12. leia (read)
13. llamo (called)
14. invito (invited)
15. fueron (went)
16. miraba (watched)
17. llego (came/ arrived)
18. fueron (went)
19. conocieron (met)
20. hablaron (talked)
21. se divirtieron (they had fun)
22. estaban (Were)
23. fueron (went, on this case on a vacation)
The answer is: ellos empezaron a trabajar