When he was a small boy, books about the sea had made Sanders want to be ______.

A．he was good at medical operations on the wounded
B．he succeeded in teaching people how to save their lives themselves
C．a doctor was the happiest man
D．his wish of being a life-saver could hardly come true

A．worked as a doctor by cleaning the medicine bottles
B．met some doctors who were very friendly to him
C．was interested in talking with patients
D．remained together with the doctors