为什么是across desert,through valleys,through mountains?

为什么是across desert,through valleys,through mountains? 有没有懂西班牙语的大神 翻译成西班牙语2001 RAGE!FIGHT FORFOOSHA VILLAGE 2005 come across the overlord of east blue2006 tears for saving Nami2008 the comeback of the tyranny2009 close battle with the strongest desert man2010 defend th They would like to t------for days across the desert 【英语】Across from the park is an old hotel.为什么是Across form the而不是The across from? this plan is to change the desert into farmland中,为什么是to change?如题 Desert 为什么是21th century 而不是21st It is a thousand kilometers____that desert,是填through还是across没记错的话，through across都是介词 it be desert nice would to a camel the ride across 连词组句 The road runs ____ the desert .横线上应填across还是through? The road runs ______ the desert.横线上应填across还是through walk through the Sixth Avenue不是要用across吗,为什么是through I bought this book at the big bookstore across the street.为什么是AT 不是IN? Litter Ben swam across the river_______(成功）为什么是successfully? You have to pass four one _way streets.为什么是pass不是across 请详细叙述through和across的差别；并解释为什么是walk across the bridge而不是through；另外walk（）the tunnel? It took them about ten days to go ___ the big desert.A through B across 请问应该选哪个? American Independence Day is c_______on 4th July答案是celebrated,为什么是过去时?