单元检测(五)一、单项填空(共15小题;每小题1分,满分15分)请从A、B、C、D四个选项中,选出可以填入空白处的最佳选项。1.Having an English class,________.A.we heard someone knock at the doorB.someone knocked at the doorC.we heard someone knocked at the doorD.the door was opened2.—I reminded you not to forget the appointment.—________.But I did forget.A.So did you B.So you didC.So I did D.So do I3.—________ either she or I fit for th