I still remember to the hospital, supported by my class teacher when I was ill at school.

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A. to be taken
(答案→)B. being taken
C. to take
D. taking
解析：句意：我仍然记得当我在学校生病的时候，我的班主任对我伸出援助之手把我送到医院。Remember doing sth.:记得做过某事 remember to do sth.记得要去做某事。根据句意作者应该是被送到医院，故用被动语态。故选B。