Multiple choice general knowledge

The doctor concluded that the man ------------------------ killed ten hours ago.

  1. had been

  2. was

  3. have been

  4. is
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A Correct answer
Explanation

The past perfect tense 'had been killed' is used because the killing happened before the doctor's conclusion (both past events). The sequence of tenses rule requires past perfect for the earlier past event. 'Was killed' is simple past, 'have been' and 'is' are present tenses that don't show this sequence of past events.

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