Fill in the blanks with "for" or "since". 1. I have lived…

Fill in the blanks with "for" or "since".

1. I have lived in this city ________ five years.
2. She has worked at the hospital ________ 2018.
3. They have been friends ________ childhood.
4. We have studied English ________ ten months.
5. He has played the guitar ________ he was twelve.
6. My parents have been married ________ thirty years.
7. She has known him ________ last summer.
8. I haven't seen my cousin ________ a long time.
9. We have had this car ________ 2015.
10. He has been sick ________ Monday.
11. I have waited for the bus ________ half an hour.
12. They have lived in London ________ two months.
13. She has worked in that office ________ last year.
14. We have talked on the phone ________ an hour.
15. He has been a teacher ________ twenty years.
16. I have worn these shoes ________ yesterday.
17. My brother has studied medicine ________ four years.
18. She has been very busy ________ the morning.
19. They have played football ________ two hours.
20. I have had this headache ________ I woke up.