hearing the news that a hurricane was coming most people left the region.A. AtB. InC. For

问题补充：

hearing the news that a hurricane was coming, most people left the region.

A. At

B. In

C. For

D. Upon

答案：

A. At

B. In

C. For

(答案→)D. Upon

解析：考查：on / upon + doing，表示“一……就”，句意：一听到这个消息飓风快来了，多数人离开了这个区域。所以选D。