问题
选择题
——It was the drug，not the disease，that killed the boy.
——He would be still alive today if he ________ that drug.
A．not take
B．shouldn’t have taken
C．didn’t take
D．hadn’t taken
答案
答案：D
考查虚拟语气。本题为错综条件虚拟语气。主句与现在事实相反，从句与过去事实相反，故从句用had + done，选D。