补全对话从每题A\ B\ C.D四个选项中，选出一个最佳答案完成对话。（5分）
-Lee,____ 66 Teachers' Day is coming.
- Your math teacher? How about a camera?
- 67
-Mmm. How about a book?
-No! A book is too cheap.
- I see. How about a CD ? 68
- No, a CD is too boring. .
- Well, how about a scarf? 69
-No. And a scarf is too personal.
-Okay, I know. 70
-Flowers? Yes, I'm sure she'll like them.
66. A. what should I get Ms Yang? B. do you know Mr Wang?
C. when is Teachers' Day? D. how's your math teacher?
67. A. Yes, that's a good idea. B. No, too expensive.
C. Sounds good. D. That's interesting.
68. A. A book is cheap. B. A CD is expensive
C. A CD is a good idea. D. A book is a good gift.
69. A. She doesn't like a scarf. B. How much is this scarf?
C. Where did she buy the scarf'? D. Would she like a scarf?
70. A. What about a dictionary? B. How about flowers?
C. Who gave the dictionary to her? D. She's my best friend.