用适当的句子补全对话）
A:You have won the first prize in the swimming competition.Congratulation..
B:1.----------------------------------------------.
A:2.---------------------------------------------?
B:I began to swim at the age of five.
A:3.---------------------------------------------?
B:I have been swmming for nine years.
A:Is it your first time to get the first prize?
B:No.I got the first prize last year.
A:4.------------------------------------------?
B;Yes,I swim every day.
A:5.----------------------------------------?
B.I swam for six hour yesterday.