勝てそうですか、と質問されて Absolutely. I wouldn't put my life on the line if I didn't feel like I could win.
put ~ on the line=~を危険にさらす=lay ~ on the line put his career on the line=職歴を賭けて I was meant to do this, and I think I was just prepared from the time I was born. いやあ、この自信はどこから? 米国人一流のポジティブ・シンキングか? And on Sunday she'll be the fourth woman ever to race in the 500and has a good chance to win it.