(环境一旦遭到破坏)____________,it takes many years for the system to recover.

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问题 (环境一旦遭到破坏)____________,it takes many years for the system to recover.

选项

答案Once environmental damage is done/caused/Once the environment is damaged

解析 本题考查对once引导的条件状语从句的掌握。once除了作副词表示“曾经,从前”讲以外,还可以充当连词,引导条件状语从句,意为“一旦…(就…)”;而将汉语“遭到”译成英文时应采用被动语态。
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