BillTrewworkedonthenightshift(夜班)inanoldcoalminecalledParkDeep.Dayandnight180minersworkedundergroundtheremorethan600feet31.Theyalltooktheir32ofnightworkbutBillalwaysworkedatnight.Hesaidhe 33_it.

Onedayhecamehomeasusualathalfpastseveninthemorning.Hehadhis“Supper”，34hecalleditandwenttobed.An35dreamtroubledhissleep.36，theonlythingherememberedaboutitwas—athrobbing(跳动)bluelight.

Billgotupintheafternoonasusual.Itwasa37gettingup—becausehecouldstillseethebluelightinfrontofhiseyes.Astheevening38darkerthelightgrewstronger.Billgotreadyforthenightshift.Butby8o'clockthebluelightwassobrightthathecould39seeanythingelse.Heandhiswifewereverypuzzled.Billhadneverbeen 40before.

“Don'tgotowork，”Mrs.Trewsaid.“Ifitisn'tbetter41tomorrowI'llhavetosendforthedoctor.”

Billdidn'tgotowork.Hesatinanarmchair，42butwithclosedeyes. 43thenthebluenesswaslikealivingthing.Itsurroundedhimsilentthrobbing.ThefamilywenttobedbutBillwasn't 44_：hestayedinhisarmchair.

At11o'clockalongloudexplosion(爆炸)__45__theground.Billopenedhiseyesand46 tohisfeet.Thebluelightwas 47 ！Herushedoutside.Someoneshouted“Gas!gasinParkDeep!Ohpitythenightshift！”

Thegasexplosionkilled179meninParkDeep.Theminewasdestroyed 48.BillTrewhasnever 49 wondering.Thebluelight:whydiditmakehimtheonlyman50forworkthatnight?

31．A.down B．around C．off D．away

32．A.order B．time C．share D．list

33．A.decided B．preferred C．suited D．needed

34．A.what B．because C．when D．as

35．A.uneasy B．unusual C．extra D．ordinary

36．A.Afterwards B．However C．Therefore D．Meanwhile

37．A.regular B．fresh C．late D．strange

38．A.turned B．developed C．grew D．fell

39．A.possibly B．hardly C．probably D．immediately

40．A.fearful B．calm C．safe