Mr. Smith gradually _____ a knowledge of the subject.
A、attainedD
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Betweenthetwopartsoftheconcertisaninterval,__________theaudiencecanbuyice-cream.
Favorablepoliciesare___________toencourageemployees'professionaldevelopment.
Icanmeetyouateighto'clock;_____youcancallforme.
---Youcouldalwaysputthedecisionoffalittlebitlonger.
---_____IfIleaveitmuchlongerImightmissmychance.
Theoldladycan'thopeto_____hercoldinafewdays.