题目

笼中有鸡兔共15只，且有40只脚，设鸡有x只，则可列方程为（ ） A . 2x＋4x＝40 B . 2x＋2（15－x）＝40 C . 4x＋4（15－x）＝40 D . 2x＋4（15－x）＝40 答案：D请根据对话内容，从下列方框中选择适当的单词或短语填空，使对话内容完整正确。has a gift for, afford, such as, do housework, concertA: Hi, Tina. What are you going to do this weekend?B: I’m going to a 【1】.A: A concert? What kind of concert is it?B: A piano concert. It is held for charity.A: Are there any famous musicians?B: Yes, there are, 【2】 Tan Dun, a world-famous composer. Would you like to go with me?A: Certainly, I’d like to. Tan Dun is my favorite musician. He 【3】 making music. How much is the ticket?B: 500 yuan.A: Oh, it’s too expensive. I can’t 【4】 it.B: I don’t have so much money, either. I plan to help my parents 【5】 to get more pocket money.A: That’s a good idea.