分类：教育/科学-学习帮助
问题：couldyoushowmehowtogettotheneare? 
could you show me  how to get to the nearest pt office.________A I certainly canB I certainly can do that C yes,of course I mustD yes,I should选Ａ，为什么
回答：could 是委婉语气，答语 用can. 
 C 用了必须，显然不好。D 答语用should 应该 
B 的 回答可以承接上文进行省略
所以用了 A 我当然可以了。