i don't like traveling by plane. i think it's s___ to travelby train

i don't like traveling by plane. i think it's s___ to travelby train
i don't like traveling by plane. i think it's s___ to travelby train

i don't like traveling by plane. i think it's s___ to travelby train
为你解答.
I don't like traveling by plane. I think it's (safer,更安全的) to travel by train.
我不喜欢乘坐飞机旅行.我认为坐火车旅行安全些.
解释：填形容词的比较级好些,把两种旅行的方式做比较.