II. Rewrite these sentences. 6. We have taken up that hobby for 2 years.  We started ______________________________________ 7. I last visited Da Nang 5 years ago.  I haven’t ________________________________________ 8. Tim last met me when we were in Da Nang.  Tim hasn’t_______________________________________ 9. We haven’t gone to school for 3 months.  We last _________________________________________ 10. My mother hasn’t gone to VinMart for 6 weeks.  The last time _____________________________________ 11. It’s a long time since Mary visited her parents.  Marry hasn’t _____________________________________ 12. It’s over 6 weeks since I had my hair cut.  I ______________________________________________ 13. I haven’t seen them for over a year.  It’s____________________________________________ 14. I have never met anyone more intelligent than Nam.  Nam is ________________________________________ 15. He is the most humourous person I’ve ever seen.  I haven’t_______________________________________ 16. How long has he worked for that company.  When__________________________________________ 17. When did they buy this computer ?  How long_______________________________________