DEAr mr. liu,wE hAvE BEEn _____1_____ with you For thE pAst thrEE yEArs, AnD During thAt timE, our ACCounts wErE _____2_____ By lEttEr oF CrEDit. _____3______, whEn wE BEgAn our trADing AssoCiAtion with you, you mEntionED thAt onCE A trADing AssoCiAtion wAs _____4_____, our pAymEnts woulD BE mADE By 60-DAy Bill oF _____5______, DoCumEnts AgAinst pAymEnt. wE FEEl thAt suFFiCiEnt timE _____6_____ pAssED to Allow this ArrAngEmEnt to BE EFFECtED、plEAsE lEt us know BEForE wE ____7______ our nExt orDEr _____8_____ thEsE nEw pAymEnt tErms ArE ACCEptABlE.wE EnClosE DEtAils oF two rEFErEEs, _____9_____ mAy BE ApproAChED shoulD you rEquirE trADE rEFErEnCEs, AnD look ForwArD to ____10______ From you.yours sinCErEly,DAviDArnolDChiEFBuyErEnCs.
A、But
B、As
C． howEvEr
D．so