问题
选择题
Having seen the X-ray, the doctor decided to ________ the patient.
A．operate
B．operate on
C．work
D．work on
答案
答案：B
题目分析：考查动词和动词短语：A．operate操作，经营，B. operate on给…做手术，C．work工作， D．work on从事，句意：看过X光后，医生决定给病人做手术。选B。