英语翻译Then one day the mystery was solved.as i approached the

英语翻译
Then one day the mystery was solved.as i approached the school he was standing in the middle of the road holding out his stop sign.i was in line behind four cars.once the kids had reached the safety of the sidewalk.he lowered his sign andlet the cars through.to the first he waved and smiled in just the same way he had done to me over the last few days.the kids already had the window down and were happily waving their reply.the second car got the same greeting from the crossing guard,andthe driver,a stiff-looking businessman,gave a brief,almost awkward wave back .each following car of kids on their way to school responded more heartily.
every morning i continued to watch the man with interest.so far i haven't seen anyone fail to wave back.i find it interesting that one person can make such a(n)difference to so many people's lives by doing one simple thing like waving and smiling warmly.his cheerfulness armed the start of my day.with a friendly wave and smiling face he had changed the feelings of the whole neighborhood.