Олимпиада Английский язык срочно

1)An e..... I can repeat every language. I hear but never have to study. What i am?
2)A b....... I can cross the river but i cant swim. What i am?
3)A b...... I can bounce but i dont have legs or feet. What i am?
4)A t.... I get wetter as you get drier. What i am?
5)The s...... I go up and i go down but i never move. What i am?