aug. 18, 1989dar liu dong,i'm back at school now. i wish to xprss my thanks to you for th wondrful vacation i spnt with you and your family. during th vacation you taught m how to swim, boat and fish. i rally apprciat① your taking tim off work to tak② m around and show m so many placs.your mothr is such a trrific③ cook! i think i must hav gaind 10 pounds just in th wk i spnt with you. surly i'v spnt a happy vacation, which will b rmmbrd for long.i hop you will b abl to visit our school somtim. thank you again. lt's kp in touch.lov,li ming