Thanks a lot dear Joseph for your reply!
Please read the above conversation. Same is suggested above by Mr. Richard Oelmann but as i told that URL & LABEL are my current requirements and later will require the quizzes as well. Hence there's a possibility that other activities i.e. assignments, folder, files, etc may also be required in future and i will have to import a same activity for all courses. So this technique is not suitable in my case.