Is a us green card holder need visa from singapore to canada for visit?

No, U.S. Lawful Permanent Residents are exempt from the visa requirement to Canada. http://cbsa-asfc.gc.ca/publications/pub/... .. Yes, you will pass through U.S. customs and immigration at the airport in Toronto. U.S. CBP is operating a so called preclearance facility.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.