68. schoolgirls I be I we I my sister III play I used / badminton I school I after I and I every day /.
A. When we were schoolgirls, my sister and 1 didn't used to playing badminton after school every day.
B. When we were schoolgirls, my sister and I didn't used to play badminton after school every day.
C. When we were schoolgirls, my sister and I used to play badminton after school every day.
D. When we were schoolgirls, my sister and I used playing badminton after school every day.
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