从事锅炉及锅炉范围内管道的安装改造工作的单位必须取得国家质检总局颁发的《特种设备安装改造维修许可证》,且只能从事许可证范围内的锅炉安装改造工作。()
参考答案:对
—Do you think we should accept that offer?
—Yes, we should, for we________such bad luck up till now, and time__________out. [ ]
A. have had; is running
B. had; is running
C. have; has been run
D. have had; has been run
完颜阿骨打