用something , someone, nothing, nonesomebody填空 The light in the room is still on. There must be (
问题描述：
用something , someone, nothing, nonesomebody填空 The light in the room is still on. There must be (
用something , someone, nothing, nonesomebody填空
The light in the room is still on. There must be () in it.
请说明理由
答
someone or somebody