Are both expressions "At the beginning" "In the beginning" valid and equivalent? The first "seems wrong" to me, but it has more Google results.
Which of these two sentences is correct: I am studying PhD at the university. I am studying PhD in the university. Should I use "at" or "in"? Or is there no difference?
When do you use at the office? And when do you use in the office? What's the difference between the phrases?
Possible Duplicate: “At” or “in” the office? I am a little confused about which preposition should be used here as in the title. I prefer to use in office. But how about the other one? Are ...