补全对话(选择)。
A: Can I help you?
B: Yes, please.____
A: For your daughter? Look, the shoes are really nice. Do you like them?
B: Yes. But I'm afraid my daughter doesn't like the color.____
A: Sure. There are different kinds of shoes over there. What color does she like?
B:____ And black is her favorite.
A: What size does she need?
B: Size 9. Let me see. Um, this pair of shoes looks nice. They are OK with her.____
A: They are only 99 yuan.
B:____ Here is the money. Thanks a lot.
A: You are welcome.
A. I'll take them.
B. Can you go to other shops?
C. I'm sorry about it.
D. May I have a look at the other shoes?
E. How much are they?
F. I need a pair of shoes for my daughter.
G. She likes white and black.
亮度变化情况是