i'm frighened of ____(travel) by plane

i'm frighened of ____(travel) by plane I'm frightened of _(travel) by plane. I am frightened of ______(travel)by plane. 《Travel by plane》 ____ is the most expensive way to travel ---by plane . 填空：We can travel by bicycle,bus,car,plane,____. I usually travel by plane的同义句 to with by travel i would like plane my friends I'm going by plane(对by plane提问) I went to ** by plane.同义句 I ____ ____ **. People ____ travel by plane many years ago A.dont B.doesnt C 每年数百万的美国人乘飞机旅行._____ ____ Americans travel by plane every ye