New Words：

luck [lʌk] n.好运;幸运
lucky [ˈlʌki] adj.有好运的;运气好的;幸运的

Sample sentences：

Good luck! I hope it goes well.
Tell him I wish him good luck!
You're out of luck(= bad luck) . She's not here.
You're in luck(= lucky) ,there's one ticket left.
Lucky for you , there's one ticket left.
I'm a lucky man.

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