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atallbuildinghasbeensetupinwhatwasawastelandbefore为什么不用where呢请讲解
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a tall building has been set up in what was a wasteland before 为什么不用where呢 请讲解
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A tall building has been set up in what was a wasteland before in what == in the place that / which== A tall building has been set up WHERE THERE was a wasteland before
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