Where tuberculosis once vanished, it came back and claimed thousands of people’s life.

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问题 Where tuberculosis once vanished, it came back and claimed thousands of people’s life.

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答案∧vanished—had

解析该句意为“在肺结核已经消灭的地区，它又死灰复燃了”。可见两个行为中vanish发生在came back之前，故应用过去完成时。

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