To know more about the British Museum, you can use the Internet or go to the library, or _______. 

Nelson Mandela devoted all his life to the struggle of the African people and      of every nation that seeks freedom．

They produced two reports, ______ of which contained any useful suggestions.

There must be ______ book which could help .

Everyone knows that Canada is the second largest country in the world, larger than _____ country in Asia.