A. The spring promotion will last for two weeksB. It varies from goods to goodsC. Nothing specialA: What do you want to buy, sir?B:【D1】______ .A: Please feel free to walk around. Take your time.B: Thank you. I'm browsing.A: All the things here are on display.B: Do you offer discount?A: Yes, sir.【D2】______ .B: How much discount do you offer?A:【D3】______ . The best discount is 40%.B: I see.