问题 更新时间2023/4/3 12:59:00 You _____ all those calculations! We have a computer to do that sort of thing.A.needn.t have doneB.shouldn.t have doneC.must not have doneD.can not have done 答案 登录 注册 参考答案:B 出自:联大 >> 三门峡职业技术学院英语读写