语言学的题目,关于语言的作用,还有语言的幽默作用等,请帮我看看吧!Useyourlinguisticknowledgeofsenserelationstoexplainwhatmakesthefollowinghumorous.Asandwichwalksintothebarandaskesthebartenderforadrink

　　语言学的题目,关于语言的作用,还有语言的幽默作用等,请帮我看看吧!

　　Useyourlinguisticknowledgeofsenserelationstoexplainwhatmakesthefollowinghumorous.

　　Asandwichwalksintothebarandaskesthebartenderforadrink.Thebartendersays:"Sorry,wedon'tservefoodhere".

　　这道题哪里看出来幽默呢,我看了半天,也没找出来,

　　Usethesentencesinthefollowingdialogueasexamplestoexplainthefunctionsoflanguage.

　　A.Seeyoutomorrow.

　　B.Oh.Iamsorry.Ican'tmakeit.

　　A.Howcome?IseverythingOK?

　　B.Yeah,it'sjustthatsomethingcameupatworkatthelastminute.I'mreallysorry.

　　A.Howdoesnextweeksound?

　　B.Perfect.

　　我觉得这里面用到了interpersonalfunction,informativefunction,还有emotivefunction所以非常想请哪位高手帮我看看,给一个准确点的答案,