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
Joying placed the buckets at all public-access areas to______.
选项
答案E
解析 根据第一段倒数第二句可知，设置这些塑料冰淇淋桶是为了收集烟头。
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