Definition: travel in an aircraft Level: A2
度假时，我经常乘飞机旅行。
When I go on holiday, I usually travel by ___air.
乘飞机旅行通常是到那里最快的方式。
___Air travel is often the fastest way to get there.
我去年乘飞机去了日本。
I went to Japan by ___air last year.
