题目

Ⅰ、从所给的句子中选择恰当的句子完成下面对话(A)（有两项是多余的）Shop worker: What can I do for you?Anna : 【1】Shop worker: What color do you like?Anna: Purple.Shop worker: All right. 【2】Betty: Small.Anna worker: What about this one?Betty: 【3】Shop worker: Certainly.Anna: Oh, I like it.【4】Shop worker: It’s 198 yuan.Anna: 【5】Shop worker: But wait a minute! There is a sale on today. Everything is half price.Anna: OK! I’ll take it. A. That’s too expensive.B. May I try it on?C. I’d like to buy a T-shirt.D. I’m afraid I don’t like it.E. H7．若y=$\sqrt{1-x}+\sqrt{x-1}+{x}^{2}-1$，你能求出2x-y的值吗？