Article: complaining about <an / the> irregular delivery

[Englishmypassion]

Hello everybody,
Is the following sentence grammatically correct?

Write a letter to the post master, complaining about an irregular delivery of your mail.

Or should the 'an' be replaced with a 'the'?
Thanks a lot.

 

[LanguageUser1234]

I would leave it out completely: complaining about irregular delivery of your mail.

 

[Englishmypassion]

Thanks. Is "delivery" (meaning the act of delivering) never preceded by "a"/ "an" , especially when there is an adjective just before it?

 

[DonnyB]

"Write a letter to the post master, complaining about an irregular delivery of your mail."

This suggests to me that you should choose one specific occasion on which your mail was late or erratic being delivered, and write a letter of compalaint about it.

"Write a letter to the post master, complaining about [the] irregular delivery of your mail."

Here, your mail is regularly late being delivered, or sometimes isn't delivered at all, so you need to write a letter complaining about it.

 

[Englishmypassion]

Oh, I didn't know that. Thank you very much, sir.

 

[Englishmypassion]

Which article would you use in the following sentence?

"As a member of our R&D team, you will have an/the opportunity to work in a fast-paced, technology-driven environment. "

(I'd use "an.")

Thanks.