1who went sightseeing in London?
2what did the guide show the man?
3what question did the American ask?
4where did they come later?
5what did the American say about the building of Houses of Parliament?
6where were the buildings built quicker?
7why did the guide smile?
8did they come to the Houses of Parliament or Westminster Abbey?
9how did the guide joke about the Houses of Parliament?
10English humor is rather interesting,isn't it?