90. Our nanny used to tell us bedtime stories. - … . a) so did my mum б) so my mum did в) so my mum used г) used my mumд)

Our nanny used to tell us bedtime stories. -  б) so my mum did.Because she did it often or usually for a long time and nanny did it also for a long time. a) isn`t correct because mother didn`t tell storries for one time. в) uncorrect sentenceд) uncorrect sentenceг) Mom told stories, and the sentence says that she did not do this.