Researchers from developing countries have gathered _______ the effects of recent increases in air pollution.

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问题 Researchers from developing countries have gathered _______ the effects of recent increases in air pollution.

选项 A、analyst
B、analysis
C、analyze
D、to analyze

答案D

解析 gather既可做不及物动词，又可做及物动词。但这里表示的是“聚集”的意思，用作不及物动词比较妥当。另外。还可以用to不定式来做补语，词义上也比较自然。

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