I: 1, I haven't eaten this cake before

2, It's ages since he last chatted with his classmates through the Internet

3, Is this the best computer you have ever had?

4, We haven't met each other for 10 years

5, It's over 20 years since he last come back to his home village

6, We haven't visited Ha Noi for three years

7, The last time I met him was when he moved to HCM city

8, It is the first time Nam has spoken to a foreigner

9, I haven't seen Hung for three months

10, I haven't played tennis since 1990

11, How long have you pained this house?

12, He started sleeping in his room 5 hours ago

13, I haven't donated blood before

14, When did they built this house?