选择合适的句子，补全对话。 A. You shouldn't eat too much meat! B. I'm a good boy now. C. What are you doing? D. And you should eat some fruit. E. What are you eating? A: ________ B: I'm having lunch. A: ________ B: I'm eating meat. A: ________You should eat some vegetables. B: OK, Mum. A: ________ B: OK, Mum. A: What a good boy! B: Yes. ________
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