1.Whileit______(rain),I______(sleep)2.He______(return)homewhenI______(sweep)thefloor3.Justashe______(drive)toLondon,hiscar______(break)down4.AsI______(wait)forthebus,I______(find)aoneyuannoteontheground5.Hewaswalkingalongtheri

　　1.Whileit______(rain),I______(sleep)

　　2.He______(return)homewhenI______(sweep)thefloor

　　3.Justashe______(drive)toLondon,hiscar______(break)down

　　4.AsI______(wait)forthebus,I______(find)aoneyuannoteontheground

　　5.Hewaswalkingalongtheriver______heheardanoise(when,while)

　　6.______hesawme,Iwaswateringthegaren(when,while)

　　7.Theboyswimming______Iwassittinginthesun(when,while)