go across与go through的区别和用法
请帮我分析下面2个句子：
1.You go through Sixth Avenue,Seventh Avenue,and Eight Avenue.
2.Go across the street and you can find the bank.
为什么1句是课本原句,在2句中我填through就错了?难道1句不是横穿马路吗?为甚用through（7年级下册）.有劳大师点拨……