题目内容

We could not reason out the way the robbers escaped,because we were unable to find any ________ of them.
A.chanceB.trace
C.point D.signal
B
句意:我们推断不出强盗是怎么逃走的,因为我们找不到他们的任何踪迹。trace“踪迹,痕迹,迹象”,符合句意。
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