She witnessed an accident a minibus had a head-on crash with a taxi.A. whatB. whichC. wh

问题补充：

She witnessed an accident a minibus had a head-on crash with a taxi.

A. what

B. which

C. where

D. that

答案：

A. what

B. which

(答案→)C. where

D. that

解析：句意：她见证了一场事故，事故中一辆小型公共汽车和一辆出租车对面撞上。这里使用的是定语从句，先行词是an accident，定语从句中不缺主宾表，缺少的是地点状语，用where引导定语从句，选C。