Question

We're living in Delhi _____ 2005.
(since/from)

Answer 1

$answer \: is \: since$

Answer 2

heya!!

We're living in Delhi _____ 2005.

We're living in Delhi since 2005.

Reason - from is used only for a particular time period like, " from 1970 to 1991".

While since is used only when there is only the starting period which will go long, like "since 2005" which hasnt end till now.

hope it helps !!