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) neither did my mum

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 sentence

д) uncorrect sentence

г) Mom told stories, and the sentence says that she did not do this.