Lunch is usually served between noon and 2:00. Sandwiches are a very
            popular quick lunch in both the United States and Canada.
            午餐通常从中午供应到下午两点。 在美国和加拿大， 三明治是极大众化的午间快餐食品。

            1.A: Please have another sandwich.
            B: Thank you, but I really can't eat any more.
            A: You're going to have dessert, aren't you?
            B: Well, I'll join you if you're having something.

            2.A: You'll finish the chicken, won't you?
            B: No, thank you. I'm trying to cut down.
            A: Aren't you going to have dessert?
            B: No, thank you. I just can't eat any more.

            3.A: Would you like some more soup?
            B: No, thank you. It's delicious, but I've had enough.
            A: Would you like soem dessert?
            B: Well, maybe I'll have just a small piece of pie.

            4.A: Can't you eat the rest of the salad?
            B: No, thanks. I'm supposed to be on a diet.
            A: Why don't we have something for dessert?
            B: I really shouldn't, but I'll have a little ice cream