四、补全对话 ( 有两项多余 ) A:16.____________ B:I am from Canada. And my name is Alice. A:Welcome. Well, there are many rules in our school. 17. ____________ B:Oh, no. Can you tell me, please? A:OK! B:Do we have to wear the school uniform every day? A:Yes, we do. B:18. ____________ A:No, we can ’ t. But we can listen to it outside. B:Can we watch TV on school nights? A:19. ____________ B:Do we have to go to bed by 10:00 at night? A:Yes, we must. B:Oh, I see. Thank you very much. A:20. ____________ A.Do you know them? B.You are welcome. C.Excuse me, where are you from? D.Yes, you are right. E.Can we listen to music in the classroom? F.No, thank you. G.Sorry, we can ’ t.