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4. We can help the experts keep animals and plants         . (endanger)

我们可以帮助专家让植物和动物远离濒危处境。

4. from being/becoming endangered endanger是及物动词,这里应该使用被动语态。

keep... from意为"使……远离……"。

题目来源:高考英语组合训练多项选择+完成句子 > 组合训练45-46

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