Question

He very carefully placed the old medal back in its glass case.

Which adverb modifies another adverb?

Answer 1

"carefully" and "very" are adverbs

"carefully" modifies "placed" ("carefully" describes how he placed the medal)
and
"very" modifies "carefully" ("very" describes how "carefully" he placed the medal)

sorry if that explanation wasn't very good, I'm trying to think of a way to explain this D:

Answer 2

anyway, "very" modifies the adverb "carefully" and "carefully" modifies the verb "placed"

Answer 3

thanks