The old man _______ has been ill for monthsA.to operate on B.operate on C.operated D.being operated on
问题描述：
The old man _______ has been ill for months
A.to operate on B.operate on C.operated D.being operated on
答
d，现在时
答
The old man being operated on has been ill for months。选D
意思是正在接受手术治疗的那个男人已经病了几个月了。
望采纳，多谢！
答
D
那位正在被做手术的老人已经病了几个月了.
operate on sb.所以被动态的on不能省略.