Dr.Bethune was busy ( )the wounded? A.operatingB.operateC.operate atD.to operate in

问题描述:

Dr.Bethune was busy ( )the wounded? A.operatingB.operateC.operate atD.to operate in

be busy doing(忙于做某事)〈固定短语〉
选Awounded是什么意思?the wounded负伤的人,受伤的人们;尤指:伤兵,伤员the +形容词表一类人如the young指年轻人the rich只有钱人