tavelling

tavelling which do you like better,travelling by air or tavelling by train?快我要的是英语答案 Tavelling by plane is—— expensive A.much more B.more much C、too much D.much too求详解求理由啊..,我想知道是A还是D 我觉得都对了。但是不知道选哪个 请问这句话是否有语法错误?Just thinking of tavelling those rain forests can I be excited.在语法上是否通顺?上面一句应为……travelling through those……