There is a peaceful and calm in the hall and everyone seems to be in high spirits.A. atm

问题补充：

There is a peaceful and calm in the hall, and everyone seems to be in high spirits.

A. atmosphere

B. air

C. stage

D. performance

答案：

(答案→)A. atmosphere

B. air

C. stage

D. performance

解析：考查名词词义辨析。A大气层；氛围；B空气；C阶段，舞台；D表现；句意：在大厅里有一种很平和和平静的氛围，每个人似乎都情绪高涨。根据句意说明A项在本句中表示氛围，故A正确。