11. It’s a long time since Mary visited her parents.
à Marry hasn’t _____________________________________
12. It’s over 6 weeks since I had my hair cut.
à I ______________________________________________
13. I haven’t seen them for over a year.
à It’s____________________________________________
14. I have never met anyone more intelligent than Nam.
à Nam is ________________________________________
15. He is the most humourous person I’ve ever seen.
à I haven’t_______________________________________
16. How long has he worked for that company.
à When__________________________________________
17. When did they buy this computer ?
à How long_______________________________________