How to use "cheer" in a sentence

Enjolras and his other friends tried to cheer him up by taking him to exciting places, but these expeditions always ended in the same way: Marius would leave the group and walk around the streets of Paris unhappily on his own.

Outside we hear the crowd cheer, and we see the first runners pass by

She decided to go for a run at the energy center; maybe it would cheer her up

a movement of feet and a cheer that seemed to be answered.