Перевод: 1. вашингтон- красивый город? 2. да, конечно. 3. а где находится белый дом? 4. белый дом расположен в центре вашингтона. дом- не большой. офис американского президента и комнаты его семьи находятся в белом доме.

1 Is Washington a beautiful city?
2 Yes, of course. 
3 And where is the White House located?
4 The White House is located in the center of Washington.
The House is not very big.
The American President's office  and the rooms of his family are in the White House.

1/ Is Washington a beautiful city? 
2/ Yes, of course. 
3/ And where is the White House situated? 
4/ The White House is situated in the center of Washington. The House isn't very large. 
The American President's office and the rooms of his family are in the White House.