问题
选择题
Although police could be seen everywhere, they seemed to be searching the houses almost ________.[ ]
A. at ease
B. at random
C. at risk
D. at length
答案
答案：B
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Although police could be seen everywhere, they seemed to be searching the houses almost ________.[ ]
A. at ease
B. at random
C. at risk
D. at length
答案：B