With tears on her face, the old lady watched the little boy__ to

With tears on her face, the old lady watched the little boy__ to a hospital.
A、send
B、to do sent
C、being sent
D、sending
【正确答案】：C
【题目解析】：本题测试非谓语动词的用法。本句的意思是：“这位老太太泪流满面，看着那个小男孩被送往医院。”本句的时态是进行时，语态是被动语态，因此C是正确答案。