Q
Hard 1 Mark
English Articles
Choose the correct article: This is ___ one-time offer you should not miss.
Explanation
'One' begins with the consonant sound /w/ (wun), so it takes 'a', despite starting with the vowel letter 'o'.
Reference: English Grammar: Articles (Complete Notes) , Page 2
Hint
'One' and 'once' sound like they start with 'w'.