Mr. Smith gradually _____ a knowledge of the subject.
A、attainedD
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Auniversityisaneducationalinstitutionwhich_____degreesandcarriesoutresearch.
Anearlytypewriterproducedlettersquicklyandneatly;thetypist,_____couldn'tseehisworkonhismachine.
Whatapity!Youmissedthesightseeing,orwe_________agoodtimetogether.
Itsoundslikesomethingiswrongwiththecar’sengine.,we’dbettertakeittothegarageimmediately.
Thenumberoftickets_____willbedeterminedbythesizeofthestadium.
