（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.