阅读理解。 MARIO: Today is my sister's birthday. She is twenty-one years old. TONY: That's great! MARIO: She wants a cake for her birthday. Let's make one. TONY: What? Can you make a cake? MARIO: Sure. My sister likes chocolate cake, so I make one every year. She says they're great. TONY: Well, OK. What do we need? MARIO: We need some flour, some chocolate, and some sugar (糖). I have them right here. There's some butter and some eggs in the refrigerator (冰箱). But I don't have any milk. TONY: Let's go and buy some milk and make a cake? MARIO: Happy birthday, Ellen. Do you like your cake? ELLEN: It's great, Mario. Thanks! MARIO: You're welcome, Ellen. But there's one thing. ELLEN: What's that? MARIO: Well, every year I make a cake, and every year you eat all of it. I'd like some, too! ELLEN: I'm so sorry! You can have a piece. 1. There is no __________ for the cake. A. butter B. sugar C. milk 2. How many things do they need for making a cake? A. 21. B. 20. C. 19. 3. How many things do they need for making a cake? A. 5. B. 6. C. 7. 4. Can Mario have any cake this year? A. Yes, he can have a lot. B. Yes, but he can only have a piece. C. No, his sister doesn't give him. 5. Is Ellen a good sister? A. Yes, she says 'Thanks' to Mario. B. Yes, she likes the cake very much. C. No, she doesn't give the cake to her brother before.