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Unit 1 In classA Listen and number录音文字稿：1. —Sit down，please，Liu Tao.—Yes，Miss Li.2. —Close the book，please.—Yes，Mr Green.3. —Look at the blackboard，Helen.—Yes，Mr Green.4. —I'm sorry，Mr Green.—Come in，please，Su Hai.参考答案：a. 2 b. 1 c. 3 d. 4B Listen and match录音文字稿：1. Mr Robot，please close my book.2. Close the window，please，Mr Robot.3. Mr Robot，open the door，please.4. Please open my book，Mr Robot.参考答案：1. d 2. a 3. b 4. cC Look and say参考答案：1. Sit down，please.2. C  | 