Mr.Smithgradually_____aknowledgeofthesubject.
A、attainedMotorists_____ofspeedingmaybebannedfromdrivingforayear.
Teachershavetoconstantlyupdatetheirknowledgeinordertomaintaintheirprofessional___.
Althoughhedoesn'tlikethatlaw,hewill_____withit.
Auniversityisaneducationalinstitutionwhich_____degreesandcarriesoutresearch.
Anearlytypewriterproducedlettersquicklyandneatly;thetypist,_____couldn'tseehisworkonhismachine.
