For a sentence below, which preposition is correct? on or at ?
" Should you have enquiry, please call me on/at 9211 xxxx (a telephone no.)".
收錄日期: 2021-04-13 17:21:18
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20100707000051KK00432