WAS and WERE

1. Were you at school/work yesterday? 
2. Was your mother at home last Monday? 
3. Were you happy last weekend? 
4. Was your home clean yesterday? 
5. Were you tired last Friday night? 
6. Was it hot yesterday? 
7. Were you in SP last month? 
8. Was your best friend with you  last week? 
9. Were you at the movies last Sunday? 
10. Was it raining last week? 
11. Were you late for work yesterday? 
12. Was the traffic hard yesterday? 
13. Were you with your friends last Saturday night? 
14. Were you  worried last Tuesday? 
15. Were you stressed last week? 
16. Was your boss at work yesterday? 
17. Were you on vacation last December? 
18. Was it cloudy last weekend? 
19. Were you at home yesterday afternoon? 
20. Was the weather good this morning?