    Sentence 1. ABC ‘aired. symphony. ‘performances. ‘by  what conductor?    Sentence 2: With ‘the help of the Magnetophon, ‘ABC  wos abje to provide its stors with greater freedom In  terms of time, and also attract several-big names;  Such as Bing Crosby ot o time when-NBC.ond CBS did.  not allow pre-taped shows.