How to make google play store recognise that the app is downloaded from them?

You can get ANY app for free from the Android Market! Go to http://www.techtipsandtricks.tk and click on 'Android', and then on 'Get any app for FREE'. You're welcome :).

Download File expert. Open it and tap on app. There is a backup button there.

Also, you'd probably need root access to reach the apk files. You could always "download" the apk file from the internet.

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.