填空题

  • 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 ______.

【参考答案】

B
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B
单项选择题
AI means the same as ______.
A．an image
B．an idea
C．anyone in the water
D．artificial intelligence
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