题目内容：

1.He is the oldest athlete ever _____an Olympic gold medal.
A.to win B.win C.won D.has won
2.What made Rodger so sad
---_____three tickets for the football match.
A.Lost B.Losing C.Because of losing D.Since he lost
3.Swan Lake is a famous ballet in four acts,_____on a German fairy tale.
A.is based B.basing C.based D.bases