根据对话内容,从对话后的选项中选出能填入空白处的最佳选项。 A: Good morning, madam. B: 1________ A: Well, I'll try. What's the problem? B: 2________ A: I see. Well, we must get it down. B: 3________ A: By sending one of our police around to your house. B: 4________ A: Oh, I think so. B: 5________ A: How will you do that? B: Oh, it is 21 Oxford Street. C: It's my cat, Jennifer. She went up a tree, and she couldn't get down. D: Hello, could you help me? E: OK. Thank you. F: Will he be able to help? G: Good morning, sir.