1) The building seems new now .Ít was very old.............
=> The building which was very old seems new now.
2) I went to see a doctor .Hệ told me to rest for a few days............
=> I went to see a doctor who told me to rest for a few days
3) A friend helped me to get a job .His father is the manager of the company........
=> A friend whose father is the manager of the company helped me to get a job.