Carelessnessmadehimfallinhisjob_______.
A、interviewWhentravelingaloneinthemountains,you’dbettertakea_______withyouincaseyougetlost.
Asateacher,youshouldnot_______thestudentsfromaskingquestionsinclass.
John_______tobeapoliteman.Butinfactheisveryrude.
Thisriverformsanatural_______betweenChinaandKorea.
Pleasebeserious.Iamnot_______.Youshouldconsideritcarefully
