选择方框中的句子补全对话，有一多余的。 A. Thanks a lot, Miss Green. B.I've just been to the English corner. C. That is a bad excuse. D. You have made a good start. E. No, I'm not. F. We all learn from mistake, dont we? A: Good morning, Miss Smith. B: Hi, Sandy. Where have you been? A： l___ B: Really'? That's great! Did you talk with Mark and Judy? A: Yes, but only a few words.  And I'm not sure if they could understand me. B：No problem. 2 __ A: But I'm afraid of making mistakes when I speak. B: 3 You should believe in yourself. A: But do you think they like to talk with us beginners? B: Yes, unless they're busy. A: Well, I'm still not so confident. You know my pronunciation is poor. B: 4 Try to talk with them as much as you can. A: All right. 5 1._________2._________3._________4._________5._________