各位大虾，请问一个新概念英语2的问题?

主语不清。
After he hitchhiked to Dover,who slept in a boat,found himself reached Calais next morning
这里的who指代的是Dover而不是he

不能直接用found
in where应该是in which

in where不对 where是副词前面不能有介词

in where ，删掉in

who slept in a boat这句完全不对啊！明明按照语义就是where he slept in a boat.
in where a lorry driver gave him a lift and something to eat这句不应该加in。