For hay since?

For hay since:
1) I haven't seen him ___ a long time.
2) New ideas have been put into practice ___ he was elected our leader.
3) He worked at that company ___ ten years before he retired.
4) Our country's economy has been stable ___ the government took control of all
prices.
5) Maggie broke her leg and had to stay in the hospital ___ two days
6) They've been in love ___ three weeks.
7) I haven't talked to him ___ last week
8) These cherry trees have bloomed every spring ___ 1980
9) They have been raising horses and cows on their farm ___ many years.
10) John and Bob have been working on this project ___ five months
11) I haven't seen him ___ a long time
12) She's been sick ___ yesterday
13) He's been working in the field ___ early this morning
14) He hasn't been in jail ___ more than three years.
15) They've been teaching here ___ quite a long time.
16) He hasn't been in jail ___ that time
17) We've been here ___ noon