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the bridge__when i passed it

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the bridge__when i passed it
the bridge broke塌了、断裂?
再问: 有四个选项 A repaired B had repaired C was being repaired D was repairing
再答: 选C, 桥正在被修,C was being repaired ,用被动,正在进行;ABC项, 桥不可以自己修