单选题
Investigators agreed that passengers 0n the airliner ______ at the very moment of the crash.
A、
should have died
B、
must be dying
C、
must have died
D、
ought to die
【正确答案】
C
【答案解析】
[解析] 情态动词+have done表示对现实状况的一种推测。故答案为C。
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