NO BOOK口语提高版 Lesson168:小费
文本：
Lesson 5 Tip
1. Thanks a million for your tips.
2. It's customary to tip someone for his service.
3. It's just on the tip of my tongue.
4. You've been doing tiptop work.
5. One guest gave me a fat tip.
6. I'm on tiptoe for vacation to begin.
7. I tiptoed out of the dowm.
8. They are at the tip of my fingers.
