Investigators agreed that passengers on the airliner must (die) ______ at the ve

游客2024-07-20  9

问题 Investigators agreed that passengers on the airliner must (die) ______ at the very moment of the crash.

选项

答案 have died

解析 本题考查情态动词。句意:调查人员一致认为机上乘客在飞机坠毁那一刻就都全部遇难。must经常表示一种肯定推测,表示对现在或将来的肯定推测;表示对过去的肯定推测,用must have done形式。本题很明显是对过去情况的推测。
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