--It was the drug.not the disease.that killed the boy.--He would be still alive
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——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
试题答案
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。