2. 外语
  3. The policeman declared that the blow on the victim’s head______from behind.

The policeman declared that the blow on the victim’s head______from behind.

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问题 The policeman declared that the blow on the victim’s head______from behind.
选项 A、should have been made
B、must have been made
C、would have been made
D、ought to have been made
答案B
解析 分析题干可知，警察在对被害人的死因进行推测，而[A]、[C]、[D]三个选项均表示虚拟，不表示推测，故排除。“情态动词must+have done”用于肯定句中，表示对过去某事的肯定推测，符合题意，故答案为[B]。
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