应该是breathing
不过个人感觉这个句子有语病,要么是noticed the robber breathing and running into the building,要么应该是noticed the rober breathing and (the witness) ran into a building.
应该是breathing
不过个人感觉这个句子有语病,要么是noticed the robber breathing and running into the building,要么应该是noticed the rober breathing and (the witness) ran into a building.