Question

—Did you look up the time of trains to Shanghai?
—Yes，the early train is ________ to leave at 5：30 am.

A．likely

B．about

C．possible

D．due

Answer 1

D

试题分析：考查固定句式。固定词组be likely to do sth可能做某事；be about to do sth马上就要做某事，与when连用；be due to do sth预定好了做某事；句意：—你有没有查一下去上海的火车时间表？—是的。最早的火车是在5点半就离开了。根据句意可知火车离开是事先预定好的事情，故D项正确。
点评：固定句式be likely to do sth可能做某事；be about to do sth马上就要做某事，与when连用；be due to do sth预定好了做某事；要把句式和句子的意思联系在一起综合考虑。