at a speed over 400 kilometers per hour the train arrived in Pudong International Airpor

问题补充：

at a speed over 400 kilometers per hour, the train arrived in Pudong International Airport in ten minutes.

A. Travelling

B. Travelled

C. To travel

D. Travel

答案：

(答案→)A. Travelling

B. Travelled

C. To travel

D. Travel

解析：考查非谓语动词。主语the train与travel之间是主动关系，所以用现在分词。句意：火车以每小时四百多公里的速度行驶，十分钟之后就到达了浦东国际机场。所以选A。