Possible Duplicate: “In school” vs “at school” I've been writing some rules for an NLP recently, and I've come across a small problem... What is the difference in ...
Possible Duplicate: Which one is more correct: “works at a university” or “works in a university”? It seems that only in the U.S. one says that they are or were "in ...
At the beginning of the century. In the beginning of the century. How to clearly distinguish when to use at, or in?