travelling by airNowadays,travelling by air is much cheaper and more convenient than before,but it also brings some environmental problems.Discuss both sides and give own opinion.请问一下这道题的思路是什么?

Frenchmen prefer travelling by train to travelling by plane.翻译 Travelling by train is more relaxing than___. Travelling by plane is very fast. travelling by plane英语作文60字 But travelling by train is quite d_____. travelling travelling travelling travelling Travelling by plane is more expensive than travelling by train 于它意思一样的句子 Mario doesn't like travelling by air （改为同义句）Mario___ travelling by ___ . Travelling by air is _____ than by train.(expensive) travelling by train is ----cheaperand------enjoyable than that by air 英语 ：通过旅游是用by travel 还是by travelling? You will feel travelling by plane than by train填空You will feel travelling by plane than by train填空 ( )We all enjoy _______a train.A.travelling by B.to travel C.travelling on I prefer travelling by train to driving.这句话能不能改成:I prefer travelling by train to travelling by drive.如果不能,是为什么呢? There are many people go travelling by train.