开头句子：
1.Iamwritingtoinformyouabout…
2.Iamwritingtoexpressmygratitudefor…
3.Iamwritingtorequestyourassistancewith…
4.Iamwritingtosharesomeexcitingnewswithyou…
5.Ihopethisletterfindsyouwell…
6.Iamreachingouttodiscuss…
7.Iamwritingtoapologizefor…
8.Iamwritingtoinquireabout…
9.Iamwritingtoupdateyouon…
尾句子：
1.Thankyouforyourattentiontothismatter.
2.Iappreciateyourpromptresponsetothisletter.
3.Ilookforwardtohearingfromyousoon.
4.Thankyouforyourconsideration.
5.Pleasedonothesitatetocontactmeifyouhaveanyfurtherquestions.
6.Iamgratefulforyourassistanceinthismatter.
7.Ihopetohearfromyouatyourearliestconvenience.
8.Thankyouinadvanceforyourhelpwiththisissue.
9.Ilookforwardtoresolvingthismatterwithyourhelp.
