---Maryhasn’tpaidfortheschoolthings,hasshe? ---______.Hermotherwi

---Mary hasn’t paid for the school things , has she ?
---______. Her mother will pay for her.A.Yes , she hasB.No , she hasn’tC.Yes , she didD.No, she didn’t

B解析英语中反义疑问句不论是肯定还是否定，只需根据实际情况回答，如果实际情况为否,就用no,……回答，如果实际情况为是，就用yes，……回答。根据下文，她妈妈要替她付款，可知前面实际情况为否，根据问答时态一致原则，问句为完成时态，所以选B

好好学习下