mary's hobby is singing . she enjoys (1) very much. when her brother (2) a karaoke set last month , mary was so glad that she sang every day after dinner.she likes to sing only (3) songs.in fact,she has already sung all the songs found(4) the karaoke discs . minh is singing in the karaoke (5) organized by the RC Center this saturday.her family is going(6) to support her