I'll treat you.
It's my treat today.
It's on me.
Be my guest.
Let me pay the bill.
A: Do you want to have a drink?
B: Sorry, I can't. I have to get home before 4 o'clock.
A: To see your boyfriend?
B: To feed my dog.
A: I'm sure your dog can wait.
B: You don't know him.
A: Come on, just a quick drink, please.
B: Okay, okay. I'll come. But just one drink and you're paying.
A: Of course. Let's go. I know a great place.
In the bar（在酒吧）
A: What do you want to drink?
B: A vodka and orange juice, please.
A: I'll be back in a moment.
B: Take your time. I'm enjoying the music.
Michael goes over a bar. The bartender approaches him.
C: Hi, what can I get you?
A: I'll have a beer, please.
C: Here you go. Anything else?
A: A vodka and orange juice.
C: I'm afraid we don't have any orange juice tonight.
A: You don't have any orange juice? But this is a bar.
C: We'll have some more tomorrow.
A: I can't wait that long.
C: Vodka and apple juice tastes good, too.
A: Are you sure?
C: Oh, yes. That's what I always drink.
C: Here you go. That'll be $6.5, please.
A: $6.5? Wow! How much is the apple juice?
A: But an apple only costs 20 cents.