Use "in". You might want to do a bit of research to compare "in" and "at" - there are plenty of explanations online.
2017년 3월 24일
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Thank you..!!
2017년 3월 24일
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It dependes on the situation..but @Shawn explain it in good way.
2017년 3월 24일
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Thank you .
2017년 3월 24일
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In American English, I would say "I am in the seat right now." or "I am sitting in the seat right now." and "She was seated in the corner." An instance where you would use "at" is in this sentence: "He was seated AT the head of the table."