单选题____you had worked hard &

问题补充：

单选题____youhadworkedhard,youwouldhaveeasilypassedthefinaltest.A.WhenB.IfC.ThoughtD.Since

答案：

B解析由句子结构可知，这是一个与过去事实相反的虚拟语气。从句的形式为If + had done, 主句用should/would/might/could have done.