Free medical service is _______ to nearly all the college students in China.
B
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Asateacher,youshouldnot_______thestudentsfromaskingquestionsinclass.
Sometimesitisverydifficultto_______someoftheEnglishwords.Eventhenativespeakercannothelp.
ProfessorSmithisalsothe_______oftheinternationalprogramoffice.Ifyouhaveanyproblemwhenyoustudyhere,youmaygotohimforhelp.
Whentravelingaloneinthemountains,you’dbettertakea_______withyouincaseyougetlost.