Three years ago in Beijing, my best friend, David, was hit by a car while riding a bike, a terrible brain injury.
A. caused
B. to cause
C. causing
D. being caused
网友回答
A. caused
B. to cause
(答案→)C. causing
D. being caused
解析：考查非谓语动词作结果状语。Doing作结果状语，表示自然而然的结果；to do表示出乎意料的结果。因为被车撞，所以受了很严重的伤，是车祸造成的自然而然的结果，所以选C。