（共5小题，每小题1分，满分5分）
根据对话情景和内容，从对话后方框所给的选项中选出能填入每一空白处的最佳选项
—Oh，madam.　【小题1】　
—I'm sorry to say the bill you sent me was incorrect.
—Incorrect，madam？　【小题2】　
—Yes，I know.　【小题3】　
—Really，madam？I find it very hard to believe.
—　【小题4】　
—Ah.Well，I must apologize，madam.It's the new computer.
—Well，don't you think it's about time you got it working properly？It's most inconvenient.
—I agree entirely.I'm very sorry about it.　【小题5】　

A. Could you help me？ B. That's very strange. C. What can I do for you？ D. And what's more，this isn't the first time. E. But I think this is the first time. F. I promise you it won't happen again. G. Look，it's happened five or six times in the past three months.