Although other nations contributed to North Sea pollution, much of the contamina

游客2025-01-19 20

问题 Although other nations contributed to North Sea pollution, much of the contamination was traced back to Britain.

选项 A、tracked
B、marked
C、traversed
D、dated

答案 A

解析词义辨析。根据上下文，题干大意为“追溯源流”，D选项最易混淆，注意date back to是动词短语，替换部分之前有be，若选择，则词形有误。

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