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couldbesee
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dflowerspla
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umberofhighbuildi
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thecityHoweversomeofthehistoricbuildi
gshavebee
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gsOurcity
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t疑难解析：
f1takeplace表示“发生”，不用被动语态。2街道被充满了小商店thestreetswerefilledwithsmallshops，因为句子已经有了谓语used
to，fill要用非谓语动词，因此用过去分词作非限制性定语，补充说明前面的streets。3thepublic。4room表示“空间”，是不可数名词。
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