he driven more carefully, the accident would not have happened the other day.A.B
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________ he driven more carefully, the accident would not have happened the other day.
A.Be
B.Had
C.Has
D.Would have
试题答案
B
解析：考查虚拟语气。“如果他开车在小心一点，事故就不会发生了。”根据主句的would not have happened可知，与过去相反，故用过去完成时，即If he had driven...，If引导的虚拟语气常用省略形式，把had提前，即Had he driven...。故选B。