——It was the drug，not the disease，that killed the boy.
——He would be still alive today if he ________ that drug.
A．not takeB．shouldn’t have taken
C．didn’t takeD．hadn’t taken
D
考查虛擬語(yǔ)氣。本題為錯(cuò)綜條件虛擬語(yǔ)氣。主句與現(xiàn)在事實(shí)相反，從句與過(guò)去事實(shí)相反，故從句用had + done，選D。
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