2. 外语
  3. Researchers from developed countries have gathered ______ the effects of water pollution on this area.

Researchers from developed countries have gathered ______ the effects of water pollution on this area.

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问题 Researchers from developed countries have gathered  ______  the effects of water pollution on this area.
选项 A、analyze
B、to analyze
C、analyst
D、analysis
答案B
解析 语法题。横线前的句子成分完成，横线后面的内容为动词不定式表目的，故选B。
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