从方框中选出合适的句子，补全对话。 A: What are you doing, Lucy? B: 1 A: Oh. How about me wearing a shirt and tie? B: Where are you going? A: To Mary's birthday party. 2 B: If I were you, I would not wear a shirt and tie. 3 A: Maybe you are right. B: 4 A: Oh, no. B: Really? 5 A: OK! Let's go to buy a present. Be quick! A. Have you had a present for the party? B. I'm reading a newspaper. C. Don't you think it's too formal (正式的)? D. What if everyone else brings a present? E. I really don't know what to wear.