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分 ) 20– 8 =? A: What’s twenty minus eight? B: It’s six. A: Sorry, you’re wrong. A: Is he you father? B: No, he isn’t. He’s Mr Green. He’s my uncle. A: Let’s go to Shanghai. B: But how? A: By train. A: What’s the time, please? B: It’s three o’clock. A: What’s in my pencil box? B: It’s a pencil.