My PR card got approved in Feb 2010. At that time I was in USA and later I got a job in USA. Now I am married to USA citizen and I have a green card. I am planning to visit family and friends in Canada in Mar 2014 with my USA green card. At the airport, shall I give all facts to the canadian immigration officer and surrender my PR card? Or shall I just keep it quite and get in on the basis of my green card. Kindly help.