Complete the phrases with for or since

EXERCISE 3. COMPLETE THE PHRASES WITH FOR OR SINCE.
1. _________three weeks 5. _________1995 9. _________January
2. _________this morning 6. _________eight months10. _________last night
3. _________one o’clock 7. _________a short time 11. _________seven days
4. _________ten years 8. _________the 1960s 12. _________five hours