By train is the safest way to travel 对划线部分提问By train划线部分

英语翻译The train is a safe ------ ------- ------. 汉译英:The train is a safe means transportation. travelling by piane is very ()(safe).At last the plane landed ()(safe). By train is the safest way to travel 对划线部分提问By train划线部分 travelling by train is not the fastest but the l____dangerous The West is safe? _____ is interesting.A.Take the train B.Taking a train C.By a train D.By trains T___ by train is the most comfortable way . what is the expensive way to travel,by plane,by train or by car 乘火车的费用是乘飞机费用的一半 The ( ) by train is ( ) ( )the ( )by plane. The best and most safe way to send a letter is by ______(register) mail. Which is the _______(interesting)way to travel,by car or by train?适当形式填空 谁会这道题：This is the train __ This is the train ____ we went to Shanghai. [ ] A.on which B.by that C.by which D.on that By means of toothed racks ,the train is able to surmount the climb中toothed racks 怎样区分by the train和take the train 我认为乘火车旅行既安全又便宜.I think _____ _____ _____ _____ _____ _____ _____ _____ travel by train.（8个空） 我的答案是I think it's not only safe but also cheap to travel by train.但是答案是I think that it is both safe a The train ____ she is traveling is arriving.A in which B by which 为什么用in而不用by this is the train _____定语从句this is the train (on which) we will go to Beijing.为什么不可以用by which?不是可以表方式吗?先行词是train还是the train?有什么区别?