After______the numbers in every possible combination, we finally hit on a solution.

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问题 After______the numbers in every possible combination, we finally hit on a solution.

选项 A、running through
B、running after
C、running over
D、running out

答案A

解析 本题考查run的动词词组辨析。run through意为“跑过,浏览”;run after意为“追逐,追赶”;run over意为“溢出,撞倒”;run out意为“用光,耗尽”。从句中we finally hiton a solution(我们终于找到了一个答案)可以看出,本题应该选A。
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