They _________ have arrived at lunchtime but their fligh Wap版

试题详情及答案解析

They _________ have arrived at lunchtime but their flight was delayed.

A．will	B．can
C．must	D．should

答案：D

试题分析：句意：他们本应该午餐时到达，但是被航班耽误了。本题考查虚拟语气故A、B项排除，must have done意为过去肯定做了某事；should have done意为过去应该做某事而实际没做，故选D。
考点：考查虚拟语气。