2026 考研英语易错题：长难句结构与指代关系辨析

阅读以下段落，回答问题：

The study on urban green spaces, which has been cited in numerous policy reports, found that their impact on reducing air pollution is more significant than previously assumed. This conclusion, however, hinges on data collected from mid-sized cities in temperate zones, a limitation that researchers acknowledge could affect its generalizability.

The word “their” in the passage refers to:
A. Policy reports
B. Urban green spaces
C. Researchers
D. Mid-sized cities

解析：
本题考查对长难句中代词指代关系的辨析能力，需结合句子结构和逻辑层次判断。

• 段落首句为主从复合句，主句核心为 “The study…found that…”，其中 “that” 引导的宾语从句中出现代词 “their”。
• 从语法结构看，“their” 作为定语修饰 “impact”，其指代对象需在从句之外的前文寻找。前半句明确提到研究对象是 “urban green spaces”，且 “their impact” 与 “reducing air pollution” 的搭配符合逻辑（绿地对减少污染的影响）。
• 干扰项 A（政策报告）是研究被引用的对象，与 “impact” 无直接关联；C（研究者）和 D（中等城市）均出现在后文，不符合代词就近指代前文核心名词的原则。

答案：B