第22题: [单项选择]Questions ]9 to 21 are based on the conversation you have just heard.A. They can’t decide on a video. B. The woman’s mother is going to use it. C. The machine isn’t working. D. The woman isn’t free until then. 参考答案:C 答案解析:[解析] 21. Why can’t they watch a video at the woman’s house