The room ___ a stale air.It must have been vacant for a long time.
问题描述：
The room ___ a stale air.It must have been vacant for a long time.
答
The room smells of stale air.It must have been vacant tor a long time.这个房间有股霉味,一定是好久没住人了.填 smells of,表示“闻起来,嗅起来怎么怎么样”的意思.