Carelessnessmadehimfallinhisjob_______.
A、interviewWhentravelingaloneinthemountains,you’dbettertakea_______withyouincaseyougetlost.
Thisriverissobigthatitisimpossibletobuilda_______underitwithoutmoderntechnology.
Sometimesitisverydifficultto_______someoftheEnglishwords.Eventhenativespeakercannothelp.
Ihavenotheardanythingfromhimsincehis_______.
Thisboywas_______forwhathehaddoneintheclass.
