（）at the railway station when it began to rain. ["Hardly had he arrived","Hardly he had arrived","No sooner did he arrive","No sooner arrived he"]
常见通信光的波长有（）。 ["1550nm","1310nm","1625nm","1425nm"]
江苏省大气污染防治条例规定，非道路移动机械超过规定排放标准的，应当实施限期治理，经限期治理仍不符合排放标准的，由环境保护、住房城乡建设、农机等行政主管部门责令停止使用。
铁路机车车辆驾驶证中，（）驾驶证准驾动车组和电力机车。 ["J1类","J2类","J3类"]
I wish that he（）to the movies with me yesterday. ["went","could go","was gone","could have gone"]
简述苏美尔人文明的三大成就？
