【____she____yesterday,shewouldmeetthefamoussingertoday.A.if:didn'tleaveB.Hadnot:leftC.Hadn't:leftD.Didn't:left个人认为从句是与过去事实相反的,而主句则是与现在事实相反的,但B和C有什么区别呢?PS:Ifonly】

　　____she____yesterday,shewouldmeetthefamoussingertoday.

　　A.if:didn'tleaveB.Hadnot:leftC.Hadn't:leftD.Didn't:left

　　个人认为从句是与过去事实相反的,而主句则是与现在事实相反的,但B和C有什么区别呢?

　　PS:

　　IfonlyI____drivingbefore.

　　A.learnB.learnedC.hadlearnedD.wouldlearn

　　我想要说的是这句话到底是对现在虚拟还是对过去虚拟呀？

　　个人认为是现在……