2. 外语
  3. A. make new materials B. preserve wetland and animals C. have clean air D. have clean water E. collect cigarette butts F. collec

A. make new materials B. preserve wetland and animals C. have clean air D. have clean water E. collect cigarette butts F. collec

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问题 A. make new materials
B. preserve wetland and animals
C. have clean air
D. have clean water
E. collect cigarette butts
F. collect disposed oil
People are grateful to Carter Dunham for his efforts to______.
选项
答案B
解析 根据第二段第一句“…preserves 20 acres of marshland and many species of wildlife．”可知，人们之所以感激Carter Dunham，是因为他建立的野生生物避难所能够保护湿地和野生物种。wetland是marshland的同义转换，而animals是species of wildlife的同义转换。
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