问题
选择题
Dr Bethune was busy _____ the wounded soldiers. [ ]
A. operating on
B. operate on
C. operate at
D. to operate in
答案
答案：A
搜题请搜索小程序“爱下问搜题”
Dr Bethune was busy _____ the wounded soldiers. [ ]
A. operating on
B. operate on
C. operate at
D. to operate in
答案：A
