题目内容

“If I ________ taking drugs, I would be a successful businessman now,” said the dying drug addict.
A．didn’t startB．haven’t startedC．hadn’t startedD．shouldn’t start
C
考查含有if条件状语从句的虚拟语气。If引导的从句指过去的情况，主句指现在的情况，是混合虚拟。If从句指过去，要用过去完成时态。所以选C。
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