PASSAGE ONE [br] What made up new ethnic groups of the United States?Massive wav

游客2023-10-23 41

问题 PASSAGE ONE [br] What made up new ethnic groups of the United States?

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答案 Massive waves of immigration．

解析根据题目中的new ethnic groups定位到第2段第3句。该句用了brought…into…来表达大批的外来移民涌入美国并给它带来了新的民族。可见新民族是由大批外来移民构成的，故Massive waves of immigration为答案。

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