选择合适的句子补全对话
A. We have these black shoes and those brown shoes.
B. They're 150 yuan.
C. Can I help you?
D. Do you want anything else?
E. I want a pair of those blue jeans.
Assistant: ?
Ben: Yes, I want a pair of shoes.
Assistant: .
Ben: How much are the black shoes?
Assistant:
Ben: I'll take them. . How much are they?
Assistant: They're 200 yuan.
Ben: No, thanks.