Sometimesitisverydifficultto_______someoftheEnglishwords.Eventhenativespeakercannothelp.
Weare_______attherapidprogressMarkhasmadeinthissemester.
Thisriverissobigthatitisimpossibletobuilda_______underitwithoutmoderntechnology.
Withthe_______ofMary,allthegirlstudentsareeagertogototheparty.
Withoutapropereducation,peoplecould_______allkindsofcrimes.