----Did you look up the time of the high-speed trains to Shanghai?----Yes the early train

问题补充：

----Did you look up the time of the high-speed trains to Shanghai?

----Yes, the early train is to leave at 5:30 a.m.

A. likely

B. possible

C. due

D. about

答案：

A. likely

B. possible

(答案→)C. due

D. about

解析：考查形容词：A. likely可能B. possible可能C. due应该，到期，预期，D. about用于be about to do即将做，句意：-你查看去上海的高铁的时间表吗？--是，早班火车预计早上5：30离开。选C。