the country which i wanna travel which 之前需不需要加个in?

In which country is the Big Ben? Which country is Venice in?In which country were the 2006 Wr 英语翻译1.In which country would you find the White House?( )2.I which country are you in? which country is london in which country is the largest geographc area in the world? which country has the biggest land area in the world? 翻译：Which part of the country is the city in Which countey is the biggest country in the world? Which country has the second_______population in the world?急 which country is the smallest in the world Can you imagain in which country the 2012 Olympic Games____?