Use “since” and “for”
1. ________ two months
2. ________ September
3. ________ 1988
4. ________ last year
5. ________ two years
6. ________ last Friday
7. ________ 9:30
8. ________ three days
9. ________ the first of January
10. ________the beginning of the term
11.________ the semester
12.________ the first day of January
13.________ almost four months
14.________ fifteen minutes
15.________ the semester started
16.________ a couple of hours
17.________ yesterday
18.________ about five weeks​