2. 外语
  3. Investigators agreed that passengers on the airliner______ at the very moment of the crash.

Investigators agreed that passengers on the airliner______ at the very moment of the crash.

admin2009-01-05  50
问题 Investigators agreed that passengers on the airliner______ at the very moment of the crash.
选项 A、should have died
B、must be dying
C、must have died
D、ought to die
答案C
解析 must have done用来表示对过去某动作的肯定推测，作“肯定，一定是”讲，例如：He must have been to England for he knows so much about that country．他一定去过英国，因为他了解那么多有关那个国家的事情。He must have forgotten to wind the clock last night．他昨晚准是忘记给表上弦了。
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