8．
Every fast-food employee knows that the drive-through window is the worst position．The window sticks with constant ice； the roar of enines hurts your
(1) ； your words are lost in the howling wind．
On a
(2) afternoon，everything changed．
Every once in a while，the sub-zero temperatures seal a
(3) windows shut．Drivers don't exactly enjoy having to stand outside in the cold，
(4) their orders into a speaker box，when they expect to drive through on their heated leather seats．In such cases，most customers tend to show their annoyance to the employees．
This woman was
(5) ．
"I'll get the next car's
(6) as well，"she said as she came up to the window to pay．She stood outside，
(7) much snowon her hair．Though she was obviously freezing，her bright
(8) lit up her face like a fire．
"You can't
(9) their drinks，"I said，confused and tired．
"No，but I'll buy them，"she said．"Pay it forward and all that．"
Completely puzzled，I charged her as
(10) ，and when the next customer arrived at the window I explained what had just hppened．I watched as his
(11) changed-first angry to be out in the cold，then
(12) at the random act of kindness，and finally，delighted by his
(13) ．
"I suppose I'll pay for the next order then，"he replied，nodding and waving at the impatient driver
(14) him．He
(15) over the cash and received his pre-paid hot drink．
The trend continued．Customers arrived annoyed only to leave
(16) and pleased．Some were shocked to spend much more than they had expected，
(17) others ended up receiving their order for less than half the price．
Five vehicles passed，then ten，then twenty No one refused to pay．Customers stood at my window
(18) a fist-full of change to buy drinks for a complete stranger．Cars drove off，honking （鸣笛） and
(19) their thanks．
It only takes one customer，one person，to change the entire
(20) of traffic．It only takes one moment，one smile，to warm up even the coldest of days．