ДАЮ 50 БАЛЛОВ! ПОЖАЛУЙСТА ПОМОГИТЕ! ОЧЕНЬ ПРОШУ!

A.I couldn't ride a horse when I was younger,but now it's not a problem for me. B.I couldn't play football well when I was younger,but now I'm the best player in my team. A.I didn't understand maths when I was younger but now I'm quite good at it. B.I couldn't play the piano when I was younger but now I can do it very well.