[解析]
W: WOW! Time flies. Do you realize it's December already? Christmas is nearly here. M: I know do you have any plans? W:We usually have a big family dinner. M:How many people are in your whole family? W:We have30. M:That's a lot of people. Do they all come to your house ?If so, you'll be pretty busy with preparing. W:That's why I'm so surprised that it's already December. I will be really busy for the rest of the month. M:That sounds stressful. My Christmas plan should be simpler. My parents will join me in Canada for a small vacation. We'll visit my uncle and ski in the Rocky Mountains. W:That sounds fun. M:I'm really excited.I'll bring you a present.