培优专项训练(五)Ⅰ.单项填空()1.ThismorningIhadhardlygottomyschoolwhenit________torain.A．hadbegunB．wasbeginningC．beganD．begins()2.He________whentheUFOarrived.Hedidn'twakeuntiltheUFOdisappeared.A．sleptB．wassleepingC．wasdoinghomeworkD．wassinging()3.—Wherewereyouat7：00lastnight?—I________tomymomathome.A．writeB．waswritingC．wroteD．amwriting()4.—DidyouseeMrBlackjustnow?—Yes.He________hiscarwhenImethim.A．parkedB．wasparkingC．p...