—Did you find out the time of the train to Miami? —Yes the early train is to leave at 5

问题补充：

—Did you find out the time of the train to Miami?

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

A. likely

B. due

C. possible

D. about

答案：

A. likely

(答案→)B. due

C. possible

D. about

解析：考查形容词：句意：--你弄清去迈阿密的火车时间了吗？--是最早的火车预计在早上5点半离开。 likely“可能”可以用于Sb/Sth is likely to do sth句型，但是意思不对，be due to do 表“按计划预定要做某事”。火车的时刻表是事先制订好的， be possible 一般以 it 作形式主语，不能用于Sb/Sth is likely to do sth句型， be about to do 不能与具体的时间状语连用，故选B。