用括号中所给单词的适当形式填空. The of aircraft made it convenient for us to travel.
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用括号中所给单词的适当形式填空。
The ________ (invent) of aircraft made it convenient for us to travel.
试题答案
答案:invention

用括号中所给单词的适当形式填空。
The ________ (invent) of aircraft made it convenient for us to travel.
答案:invention