选A as long as 表示 只要 的意思.只要你能把书保持的干干净净,你就可以借走这本书.当然as long as 字面意思是长达.比如,the great wall is as long as 10000km.长城长达一万米.而as far as 字面意思是远达.,比如Beijing is as far as 1200000m from my homtown.另一层含义是据.常常构成as far as i know 据我所知 .
当然了因为两者是as..as...结构,所以本身意思还有和,一样远或者长的意思哦.
in case 以免...
even if 即使
我解释的还不够好吗?楼主?