The car ran into a crowd of middle school students, to hospital immediately.
A. two of whom sent
B. two of them sending
C. two of whom are sent
D. two of them sent
网友回答
A. two of whom sent
B. two of them sending
C. two of whom are sent
(答案→)D. two of them sent
解析：考查独立主格结构。两学生被送往医院所以应该用过去分词。C选项为定语从句但是时态不正确应用过去时。所以选D。