Question

Which sentence uses refrain as a noun?

The flight attendant requested that the passengers refrain
from smoking.
Students should refrain from using their cell phones
during the lecture.
Experienced audience members refrain from clapping
until the end.
The haunting refrain stayed with the audience long after
the show ended.

Answer 1

Answer: the last sentence.

the verb "refrain" means to keep from.

the noun, however, is something that is repeated like a phrase or song.

hope this helped!

Answer 2

D. The haunting refrain stayed with the audience long after the show ended.

Step-by-step explanation:

everything else is using it as a verb lol. a noun is a person, place or thing and thats using it as a noun.