WHEN I WAS A CHILD, ________. A. I GOT OFTEN USED TO HEAR MY MOTHE...

18. When I was a child, ________.

A. I got often used to hear my mother sing folk songs.

B. I was used to hear my mother singing folk songs.

C. I used to hear my mother sing folk songs.

D. My mother got used to sing folk songs for me to hear.

Choose the best answer among A, B, C, or D that best completes each sentence