【题目】 The mother looks upset outside the operating room, whose son _________ on.
A. is being operated B. is operated
C. has been operated D. was operated
在线课程【答案】A
【解析】
试题分析:考查现在进行时的被动语态。现在进行时是be+doing，做手术是be operated,正在做手术是be being operated,句意：手术室外这位母亲非常担忧，他的儿子正在做手术。故选A。