答案：My father was told to give up smoking by the doctor.
原句翻译：医生告诉我父亲戒烟。
本句是带有复合宾语的主动语态的句子。
带复合宾语的动词在改为被动语态时，把主动语态的宾语my father改为主语，宾语补足语to give up smoking在被动语态中作主语补足语。
My father是三单，told说明是过去时。故be动词用was
因此答案为：My father was told to give up smoking by the doctor.
