Unit 1 Part B 第一课时一、听录音,写单词。1. 2. 3. 4. 5. 6. 7. 8. 二、听录音,选出你所听到的句子。1. A. Let’s clean the classroom.B. Let’s go and see the classroom.2. A. What’s in your new bag?B. What’s in your new classroom?3. A. Let me clean the door.B. Let me clean the window.4...