1. We (not see) haven't seen Nga since monday
2. Lan (be) has been in the USA for 2 year
3.I (go) went to bed at 11 o'clock last night 
4.They (move) moved to london in 2003
5.They (live) have lived in HCM cince January 
6.That's a very old bike he (have) has had it for a long time
7.I (buy) bought in the motorbike 5 years ago.
8.Peter (be) has been ill for a week 
9.Hoa (visit) visits her parent once a year 
10. What do you (do) do on your birthday 
11. Hoa and Linh often (play) play badminton after class
12. Many people in the countryside still (work) work Seven days a week