It is imperative that students _____ their term papers on time.
A
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Ofcourse,()mostimmigrantsdidnotgetrichovernight,buttheofthemwereeventuallyabletoimproveupontheirformerstandardofliving.
Even if his letter____tomorrow , it____too late to do anything.
Thethreementriedmanytimestosneakacrosstheborderintotheneighboringcountry_____bythepoliceeachtime.