摘要： Once harm is to the eco-system, all species will , including man himself. A. made; be in danger B. done; be dangerous C. caused; be endangered D. done; be in danger
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Once harm is _______ to the eco-system, all species will ________, including man himself.
A. made; be in danger B. done; be dangerous
C. caused; be endangered D. done; be in danger
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Once harm is _______ to the eco-system, all species will ________, including man himself.
[ ]
A. made; be in danger
B. done; be dangerous
C. caused; be endangered
D. done; be in danger
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B. done; be dangerous
C. caused; be endangered
D. done; be in danger
Once harm is _______ to the eco-system, all species will ________, including man himself.
| A．made; be in danger | B．done; be dangerous |
| C．caused; be endangered | D．done; be in danger |