请英语高手们来看看这道虚拟句.Mr.Green________myletter,otherwisehewouldhaverepliedbeforenow.A,musthavereceivedB,musthavefailedtoreceiveC,mustreceiveD,mustfailtoreceiveotherwise的虚拟句一般不是其前的句子

　　请英语高手们来看看这道虚拟句.

　　Mr.Green________myletter,otherwisehewouldhaverepliedbeforenow.

　　A,musthavereceivedB,musthavefailedtoreceiveC,mustreceiveD,mustfailtoreceive

　　otherwise的虚拟句一般不是其前的句子用一般陈述语气,后用虚拟语气吗?那应该选D啊,