根据对话内容与上下文，在空白处填入适当的句子，使对话意思完整。 A: Hello, 6817502. B: Hello. ______________________________________________________? (1) A: Sorry, _______________________________________. (2) This is Jim's mother, Mrs Green. Can I take a message? B: That's very kind of you. This is David, Jim's friend. I ask him for some Chinese stamps. He told me he had got some last week. A: OK. I will tell him about it. Would you like him to call you back later? B: Well, I won't be at home today. My mother is ill, so I must go to the hospital to look after her. Would you please ask him to ring me tomorrow morning? A: Oh, ________________________________________________.(3) I'll let Jim know it. By the way, ______________________________________________?(4) B: Oh. My phone number is 6877242. A: 6877242, right? B: Yes, that's right. Thanks a lot. A: _____________________________________________________________.(5)