1100pm．D830pm1030pm．25．（8分）Fiveyearsago，whe
Itaughtartataschooli
Seattle，IusedTi
kertoysasatestatthebegi
i
gofatermtofi
doutsomethi
gaboutmystude
ts．IputasmallsetofTi
kertoysi
fro
tofeachstude
t，a
dsaid：