问题描述：
The air is made up of more than 70% of nitrogen（同义句）
The air ___ ___ ___ more than 70% of nitogen
The air ___ ___ ___ more than 70% of nitogen(要两种不同的填法)
The air ___ ___ ___ more than 70% of nitogen
The air ___ ___ ___ more than 70% of nitogen(要两种不同的填法)
问题解答：
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