i'm sorry i ___ that you didn't understand what i said. now let me try to speak again.A don't know B didn't know 答案是B,句子有现在时态又有过去时态, 如何理解选择B?多谢!
来源：学生作业帮助网 编辑：作业帮 时间：2024/11/30 19:57:01
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