I would like to give you a prisonS什么意思

The prisons are ______over-crowded_______ the farlands are empty.
A.so as
B.as as
C.much as
D.too to
答：B
译：监狱里人满为患,而地里却无人耕作.
析：
“ as...as...”的结构的理解和翻译
　1.当主语是同一性质的事物比较时,as …… as …… 解释为“同……一样”
　　例：John is as bright as Bob.约翰和鲍博一样聪明.
　2.当 as …… as …… 结构的主语相同,而比较项目不同,即把同一事物两种不同性质的方面等同比较时,相当于 both …… and …… ,可译为“既……又……”
　　例：He is as brave as wise.他既勇敢又聪明.
　　She is as gifted as diligent.她不但有天赋,而且勤奋.
　除此以外,as …… as…… 还有以下几种用法：
　　1.as …… as …… 结构的两个主语和两个比较项目都不同,即把两个不同的人和物在不同的方面比较时,相当于 whereas ,可译为“而”.
　　例：He was as experienced as his brother was green.他经验丰富,而他的弟弟则涉世未深.
.（此处省略500字）
本题就属于这种情况.