Fortunately, the bank clerk ______ press the alarm button before the robbers got away.

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问题 Fortunately, the bank clerk ______ press the alarm button before the robbers got away.

选项 A、could
B、succeeded in
C、was able to
D、managed

答案C

解析 was able to表示过去做成具体某事的能力,could表示过去一般的能力。
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