Answer:
The similarity is that all of the masculine nouns end in an -o. All of the feminine nouns end in a -a. This helps because it is easier to tell which nouns are masculine/feminine by looking at the last letter
1. sirvio
2. construimos
3. limpiaron
4. oimos
5. dormiran
6. lee
7. plancha
8. habla
9. compre
10.creen
11. construyeron
12. hablo
13. canta
14. come
15. juegan
16. prefieren
17. trabaja
18. miente
19. dice
20. gano
Explanation:
