dear，

　　iwouldliketoknowificouldaskforacasualleaveofabsencefromyouroralenglishclassthiswednesdaymorning.

　　yesterdayeveningigotaphonecallfrommycousin,，，iregardthisasagoldenopportunitytoputwhatihavelearnedinyourclassintopractice，，iamconfidentthatilldoagoodjobandbothofuswillgrateful.

　　earnestlyyours，

　　xxx