The top leaders of the two countries are holding talks in a friendlyA. atmosphereB. stateC

问题补充：

The top leaders of the two countries are holding talks in a friendly

A. atmosphere

B. state

C. situation

D. phenomenon

答案：

(答案→)A. atmosphere

B. state

C. situation

D. phenomenon

解析：

atmosphere氛围，D意为现象。