The houses were randomly scattered; the terrorists fired into the crowd without aim
单选题The houses were randomly scattered; the terrorists fired into the crowd without aim.
A.in bulk
B.in essence
C.at length
D.at random
参考答案：D
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答案解析：这句话的意思是：房子随意散布，恐怖分子胡乱地向人群开枪。画线词组without aim意为“没有目标地”；at random意为“随机地”；in bulk意为“大量地”；in essence意为“本质地”；at length意为“详细地”。因此选项D为正确答案。
