to win the tickets for their next concert 这是目的状语,all 是主语 ,you have to do 是all的定语从句,is是谓语,answer this question 是表语,不过你应该在answer前加to,因为is和to都是动词,用to隔开.为了赢得他们...问题补充：本文是比赛得奖品。最后一句是：and now back to some music。back to什么意思是返回到....的意思