What article is used before nouns followed by a number or a letter?

Do not use any article before a noun identified by a number or a letter. The noun is already considered determined by the identifier.

example: Please refer to columns A and B.
Solidify this and other rules

More rules like this

Phrase the Cat inviting to practise English Phrase the Cat waving

At PhraseCat.com you can study a brief grammar rule and start creating new phrases based on it right away.