对患者的义务，错误的认识是

A．不能怀疑医师的诊断和治疗

B．为支持医学教学而为学生做示教

C．避免将疾病传播给他人

D．尊重医务人员劳动

E．支付医疗费用

—What did Frankie do when he was young?

—He______ play the piano very often.[ ]

A. uses to        

B. used to        

C. is used to        

D. was used to