Прочитать сказку про русалочку Ариэль и вставить пропущенные слова could, couldn't, had. At the beginning of the story

At the beginning of the story Ariel had no legs, but she had a tail. So she couldn\'t walk, but she could swim. She also could sing very beautifully. Later Ariel asked Ursula to give her legs and take her voice instead. Then Ariel had legs, but she had no tail. She could walk, but she couldn\'t sing. A sad story, isn\'t it?