All the doctors in the hospital insisted that he badly wounded and that he at once．
A. should be; be operated on
B. were; must be operated on
C. was; should be operated
D. was; be operated on
网友回答
A. should be; be operated on
B. were; must be operated on
C. was; should be operated
(答案→)D. was; be operated on
解析：本题考查动词用法。Insist作“坚持认为”讲，用真实语气；作“坚持要求”讲，用should+ v原形的虚拟语气，should可以省略，故选D。