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The word hey underlined in Paragraph 4 refe

2022-08-01 20:21:41 问答库阅读 166 次

问题详情

The word "they" underlined in Paragraph 4 refers to ______.
A．years
B．climates
C．sediments
D．cores

正确答案：C
解析：根据上下文，此处的they应是物质名词，因而应选C项。