More exactly, is "at door" correct? Thanks!
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1Welcome to English Language and Usage. Did you try to Google "at the door"' and "at door"? I've just found there is a huge difference in results. Our community doesn't encourage a simple question without any research efforts. Especially, is it coorect? type of question is not welcome. Please visit our Help Center for additional guidance. If you are a speaker of other languages learning English, you can consider visiting our sister site, English Language Learners – user140086 Mar 7 '16 at 18:40