10. It is monday since i last took a bath.
11. She hasn't comeback to her hometown for 4 years.
12. He has worked as a bankclerk for 3 months.
13. We haven't flownto Singapore for 5 years.
14. I haven't had my hair cut since November.
15. We haven't called each other for 5 months.
16. We haven't met since a long time.
17. How long is it since you had it.
18. I haven't had such a delicious meals before.
