“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條件狀語從句的虛擬語氣。If引導(dǎo)的從句指過去的情況，主句指現(xiàn)在的情況，是混合虛擬。If從句指過去，要用過去完成時態(tài)。所以選C。
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