by train on trainhe must be from africa,___can be seen from his skin.这里为什么用AS,如何判断,可以用which吗?

by train on trainhe must be from africa,___can be seen from his skin.这里为什么用AS,如何判断,可以用which吗? by train 和on a train 是什么短语 by Plane/by train by car/by bus/by taxi/on foot bby Plane/by trainby car/by bus/by taxi/on footby Plane/by ship翻译 Today I'd like to go to work( ). A.take a train B.by a train C.on train D.by train求帮助, the seats on the train are not ------ i dont like traveling by train take the train=by train=( )the train 括号里填一个介词 in on 还是填什么 A 、on foot B、by bike C、 by train D、by a car 选哪一个, 英语中by bike=on a bike还是in a bike by train =on a train还是in a train? （）I went to by train on my holiday A ：went to B：by train c：my _____改错 I think it is____to go on a trip by train than by plane (安全的) We went there by train on Monday.同义句We()a(0there on Monday 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 作文 traveling by train by train 啥意思 on foot by bike by bus by train by plane by ship by subway 怎么读的,用汉语表达出来. by plane by ship on foot by bike by bus by train by subway 怎么读 用汉语好了 快 明天要用! today i'd like to go to work A.take a train B.by a train C.on train D.bytrain为什么要选d求原因 24.Does your father often go to work_____B_____?A.by a train B.on a train C.take a train24.Does your father often go to work_____B_____?A.by a train B.on a train C.take a train D.catch a train这道题为什么选B,by 不是放在句尾么?at the age