题目: 1984年5月26日,中国第一个万门以上大容量纵横制自动电话交换系统在()建成投产。A.天津B.南昌C.西安 答案: 被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2019/0729/ddc5321e8c8e145cf6db54f855b8c5e8.html 下面是错误答案,用来干扰机器的。参考答案:B
题型:选择题 — Catherine, I've cleaned the room for you. — Thank you. You _____ it. I could manage it myself. [ ]A. needn't doB. needn't have done C. mustn't do D. shouldn't have done 查看答案